Finding the Fourth Proportional to 90,504.31, 124,900.17 and 56,532.91

Step by Step Solution

1. Step 1: Write the proportion equation
   90,504.31 : 124,900.17 = 56,532.91 : x
2. Step 2: Convert to fraction form
   90,504.31/124,900.17 = 56,532.91/x
3. Step 3: Cross multiply
   90,504.31x = 124,900.17 × 56,532.91
4. Step 4: Simplify right side
   90,504.31x = 7,060,970,069.59
5. Step 5: Solve for x
   x = 7,060,970,069.59/90,504.31
6. Step 6: Final answer
   x = 78,018.05