Finding the Fourth Proportional to 103,543.55, 142,831.72 and 62,139.96

Step by Step Solution

1. Step 1: Write the proportion equation
   103,543.55 : 142,831.72 = 62,139.96 : x
2. Step 2: Convert to fraction form
   103,543.55/142,831.72 = 62,139.96/x
3. Step 3: Cross multiply
   103,543.55x = 142,831.72 × 62,139.96
4. Step 4: Simplify right side
   103,543.55x = 8,875,557,367.53
5. Step 5: Solve for x
   x = 8,875,557,367.53/103,543.55
6. Step 6: Final answer
   x = 85,718.11