Finding the Fourth Proportional to 142,601.28, 196,787.37 and 78,937.71

Step by Step Solution

1. Step 1: Write the proportion equation
   142,601.28 : 196,787.37 = 78,937.71 : x
2. Step 2: Convert to fraction form
   142,601.28/196,787.37 = 78,937.71/x
3. Step 3: Cross multiply
   142,601.28x = 196,787.37 × 78,937.71
4. Step 4: Simplify right side
   142,601.28x = 15,533,944,344.72
5. Step 5: Solve for x
   x = 15,533,944,344.72/142,601.28
6. Step 6: Final answer
   x = 108,932.71