Finding the Fourth Proportional to 71,689.86, 98,924.49 and 39,853.62

Step by Step Solution

1. Step 1: Write the proportion equation
   71,689.86 : 98,924.49 = 39,853.62 : x
2. Step 2: Convert to fraction form
   71,689.86/98,924.49 = 39,853.62/x
3. Step 3: Cross multiply
   71,689.86x = 98,924.49 × 39,853.62
4. Step 4: Simplify right side
   71,689.86x = 3,942,499,033.15
5. Step 5: Solve for x
   x = 3,942,499,033.15/71,689.86
6. Step 6: Final answer
   x = 54,993.82