Finding the Fourth Proportional to 124,720.16, 172,105.72 and 68,131.52

Step by Step Solution

1. Step 1: Write the proportion equation
   124,720.16 : 172,105.72 = 68,131.52 : x
2. Step 2: Convert to fraction form
   124,720.16/172,105.72 = 68,131.52/x
3. Step 3: Cross multiply
   124,720.16x = 172,105.72 × 68,131.52
4. Step 4: Simplify right side
   124,720.16x = 11,725,824,304.29
5. Step 5: Solve for x
   x = 11,725,824,304.29/124,720.16
6. Step 6: Final answer
   x = 94,017.07