Finding the Fourth Proportional to 71,385.48, 98,517.96 and 39,557.34

Step by Step Solution

1. Step 1: Write the proportion equation
   71,385.48 : 98,517.96 = 39,557.34 : x
2. Step 2: Convert to fraction form
   71,385.48/98,517.96 = 39,557.34/x
3. Step 3: Cross multiply
   71,385.48x = 98,517.96 × 39,557.34
4. Step 4: Simplify right side
   71,385.48x = 3,897,108,439.83
5. Step 5: Solve for x
   x = 3,897,108,439.83/71,385.48
6. Step 6: Final answer
   x = 54,592.45