Finding the Fourth Proportional to 71,816.69, 99,107.71 and 39,986.27

Step by Step Solution

1. Step 1: Write the proportion equation
   71,816.69 : 99,107.71 = 39,986.27 : x
2. Step 2: Convert to fraction form
   71,816.69/99,107.71 = 39,986.27/x
3. Step 3: Cross multiply
   71,816.69x = 99,107.71 × 39,986.27
4. Step 4: Simplify right side
   71,816.69x = 3,962,947,651.14
5. Step 5: Solve for x
   x = 3,962,947,651.14/71,816.69
6. Step 6: Final answer
   x = 55,181.43