Finding the Fourth Proportional to 71,697.69, 98,941.50 and 39,866.31

Step by Step Solution

1. Step 1: Write the proportion equation
   71,697.69 : 98,941.50 = 39,866.31 : x
2. Step 2: Convert to fraction form
   71,697.69/98,941.50 = 39,866.31/x
3. Step 3: Cross multiply
   71,697.69x = 98,941.50 × 39,866.31
4. Step 4: Simplify right side
   71,697.69x = 3,944,432,510.87
5. Step 5: Solve for x
   x = 3,944,432,510.87/71,697.69
6. Step 6: Final answer
   x = 55,014.78