Finding the Fourth Proportional to 71,807.48, 99,092.39 and 39,976.38

Step by Step Solution

1. Step 1: Write the proportion equation
   71,807.48 : 99,092.39 = 39,976.38 : x
2. Step 2: Convert to fraction form
   71,807.48/99,092.39 = 39,976.38/x
3. Step 3: Cross multiply
   71,807.48x = 99,092.39 × 39,976.38
4. Step 4: Simplify right side
   71,807.48x = 3,961,354,342.40
5. Step 5: Solve for x
   x = 3,961,354,342.40/71,807.48
6. Step 6: Final answer
   x = 55,166.32