Finding the Fourth Proportional to 71,688.52, 98,927.34 and 39,855.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71,688.52 : 98,927.34 = 39,855.10 : x
2. Step 2: Convert to fraction form
   71,688.52/98,927.34 = 39,855.10/x
3. Step 3: Cross multiply
   71,688.52x = 98,927.34 × 39,855.10
4. Step 4: Simplify right side
   71,688.52x = 3,942,759,028.43
5. Step 5: Solve for x
   x = 3,942,759,028.43/71,688.52
6. Step 6: Final answer
   x = 54,998.47