Finding the Fourth Proportional to 139,132.28, 192,002.88 and 75,470.08

Step by Step Solution

1. Step 1: Write the proportion equation
   139,132.28 : 192,002.88 = 75,470.08 : x
2. Step 2: Convert to fraction form
   139,132.28/192,002.88 = 75,470.08/x
3. Step 3: Cross multiply
   139,132.28x = 192,002.88 × 75,470.08
4. Step 4: Simplify right side
   139,132.28x = 14,490,472,713.83
5. Step 5: Solve for x
   x = 14,490,472,713.83/139,132.28
6. Step 6: Final answer
   x = 104,148.89