Finding the Fourth Proportional to 71,557.56, 98,745.57 and 39,724.43

Step by Step Solution

1. Step 1: Write the proportion equation
   71,557.56 : 98,745.57 = 39,724.43 : x
2. Step 2: Convert to fraction form
   71,557.56/98,745.57 = 39,724.43/x
3. Step 3: Cross multiply
   71,557.56x = 98,745.57 × 39,724.43
4. Step 4: Simplify right side
   71,557.56x = 3,922,610,989.55
5. Step 5: Solve for x
   x = 3,922,610,989.55/71,557.56
6. Step 6: Final answer
   x = 54,817.56