Yes.
As a decimal, it is 4. This is an integer and there is not a sensible way to represent it as a mixed number.
A decimal number is simply a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. A decimal representation does not require a decimal point. So provided the number is a decimal fraction, it can be represented as a mixed number. If it is a decimal integer then it is not a mixed number and it makes no sense to try to represent it as one.
86.04 is a mixed number in decimal form and there is no sensible way to represent it as a whole number. The whole part of it is 86.
26.325 is a mixed number in decimal form and there is no sensible way to represent it as a whole number.
6.9 is a mixed fraction in decimal form and there is no sensible way to represent it as a whole number.
3.14 is a mixed fraction in decimal form and there is no sensible way to represent it as a whole number.
30.07 is a mixed fraction in decimal form and there is no sensible way to represent it as a whole number.
As a decimal it is 193, exactly as in the question. Also, 193 is an integer and so there is no sensible way to represent it as a mixed number.
912.574 is a mixed number in decimal form and there is no sensible way to represent it as a whole number. The whole part of it is 912.
3585335.452 is a mixed number in decimal form and there is no sensible way to represent it as a whole number. The whole part of it is 3585335.
5.4 is a mixed number in decimal form and there is no sensible way to represent it as a whole number. You cannot convert it.
176.54 is a mixed number in decimal form and there is no sensible way to represent it as a whole number. The whole part of it is 176.