Finding the Fourth Proportional to 71,686.52, 98,929.92 and 39,423.59

Step by Step Solution

1. Step 1: Write the proportion equation
   71,686.52 : 98,929.92 = 39,423.59 : x
2. Step 2: Convert to fraction form
   71,686.52/98,929.92 = 39,423.59/x
3. Step 3: Cross multiply
   71,686.52x = 98,929.92 × 39,423.59
4. Step 4: Simplify right side
   71,686.52x = 3,900,172,110.16
5. Step 5: Solve for x
   x = 3,900,172,110.16/71,686.52
6. Step 6: Final answer
   x = 54,405.94