Finding the Fourth Proportional to 71,391.40, 98,514.72 and 39,559.62

Step by Step Solution

1. Step 1: Write the proportion equation
   71,391.40 : 98,514.72 = 39,559.62 : x
2. Step 2: Convert to fraction form
   71,391.40/98,514.72 = 39,559.62/x
3. Step 3: Cross multiply
   71,391.40x = 98,514.72 × 39,559.62
4. Step 4: Simplify right side
   71,391.40x = 3,897,204,887.61
5. Step 5: Solve for x
   x = 3,897,204,887.61/71,391.40
6. Step 6: Final answer
   x = 54,589.28