Finding the Fourth Proportional to 71,361.59, 98,478.72 and 39,529.80

Step by Step Solution

1. Step 1: Write the proportion equation
   71,361.59 : 98,478.72 = 39,529.80 : x
2. Step 2: Convert to fraction form
   71,361.59/98,478.72 = 39,529.80/x
3. Step 3: Cross multiply
   71,361.59x = 98,478.72 × 39,529.80
4. Step 4: Simplify right side
   71,361.59x = 3,892,844,105.86
5. Step 5: Solve for x
   x = 3,892,844,105.86/71,361.59
6. Step 6: Final answer
   x = 54,550.98