Finding the Fourth Proportional to 139,517.28, 192,628.88 and 93,645.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,517.28 : 192,628.88 = 93,645.72 : x
2. Step 2: Convert to fraction form
   139,517.28/192,628.88 = 93,645.72/x
3. Step 3: Cross multiply
   139,517.28x = 192,628.88 × 93,645.72
4. Step 4: Simplify right side
   139,517.28x = 18,038,870,160.39
5. Step 5: Solve for x
   x = 18,038,870,160.39/139,517.28
6. Step 6: Final answer
   x = 129,294.88