There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of two or more fractions. Even if you converted your numbers (x) to their fraction equivalents (x/1), the LCD would always be 1.
14.
1862
4410
1078
98
The Least Common Multiple of 98, 28, and 16 is 784.
For 98, 28 and 12 the LCM is: 588
7
The LCM is: 196
980
The lowest common denominator of 347 and 98 is 1.
Well, honey, the least common multiple of 28, 42, and 98 is 588. It's like finding the perfect outfit that fits everyone at the party - not easy, but definitely doable. Just multiply the highest power of each prime factor that shows up in any of the numbers, and voilà, you've got your answer.