Finding the Fourth Proportional to 71,709.33, 98,949.27 and 39,872.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71,709.33 : 98,949.27 = 39,872.10 : x
2. Step 2: Convert to fraction form
   71,709.33/98,949.27 = 39,872.10/x
3. Step 3: Cross multiply
   71,709.33x = 98,949.27 × 39,872.10
4. Step 4: Simplify right side
   71,709.33x = 3,945,314,693.62
5. Step 5: Solve for x
   x = 3,945,314,693.62/71,709.33
6. Step 6: Final answer
   x = 55,018.15