Finding the Fourth Proportional to 102,520.49, 141,401.87 and 75,287.98

Step by Step Solution

1. Step 1: Write the proportion equation
   102,520.49 : 141,401.87 = 75,287.98 : x
2. Step 2: Convert to fraction form
   102,520.49/141,401.87 = 75,287.98/x
3. Step 3: Cross multiply
   102,520.49x = 141,401.87 × 75,287.98
4. Step 4: Simplify right side
   102,520.49x = 10,645,861,243.17
5. Step 5: Solve for x
   x = 10,645,861,243.17/102,520.49
6. Step 6: Final answer
   x = 103,841.31