Finding the Fourth Proportional to 127,720.57, 174,978.00 and 122,931.95

Step by Step Solution

1. Step 1: Write the proportion equation
   127,720.57 : 174,978.00 = 122,931.95 : x
2. Step 2: Convert to fraction form
   127,720.57/174,978.00 = 122,931.95/x
3. Step 3: Cross multiply
   127,720.57x = 174,978.00 × 122,931.95
4. Step 4: Simplify right side
   127,720.57x = 21,510,387,002.84
5. Step 5: Solve for x
   x = 21,510,387,002.84/127,720.57
6. Step 6: Final answer
   x = 168,417.56