Finding the Fourth Proportional to 71,650.80, 98,866.17 and 39,815.37

Step by Step Solution

1. Step 1: Write the proportion equation
   71,650.80 : 98,866.17 = 39,815.37 : x
2. Step 2: Convert to fraction form
   71,650.80/98,866.17 = 39,815.37/x
3. Step 3: Cross multiply
   71,650.80x = 98,866.17 × 39,815.37
4. Step 4: Simplify right side
   71,650.80x = 3,936,393,139.03
5. Step 5: Solve for x
   x = 3,936,393,139.03/71,650.80
6. Step 6: Final answer
   x = 54,938.58