Finding the Fourth Proportional to 102,872.17, 141,978.71 and 62,578.11

Step by Step Solution

1. Step 1: Write the proportion equation
   102,872.17 : 141,978.71 = 62,578.11 : x
2. Step 2: Convert to fraction form
   102,872.17/141,978.71 = 62,578.11/x
3. Step 3: Cross multiply
   102,872.17x = 141,978.71 × 62,578.11
4. Step 4: Simplify right side
   102,872.17x = 8,884,759,332.04
5. Step 5: Solve for x
   x = 8,884,759,332.04/102,872.17
6. Step 6: Final answer
   x = 86,366.99