Finding the Fourth Proportional to 142,391.28, 196,564.41 and 91,477.92

Step by Step Solution

1. Step 1: Write the proportion equation
   142,391.28 : 196,564.41 = 91,477.92 : x
2. Step 2: Convert to fraction form
   142,391.28/196,564.41 = 91,477.92/x
3. Step 3: Cross multiply
   142,391.28x = 196,564.41 × 91,477.92
4. Step 4: Simplify right side
   142,391.28x = 17,981,303,372.83
5. Step 5: Solve for x
   x = 17,981,303,372.83/142,391.28
6. Step 6: Final answer
   x = 126,280.93