Finding the Fourth Proportional to 142,132.26, 196,142.81 and 78,470.18

Step by Step Solution

1. Step 1: Write the proportion equation
   142,132.26 : 196,142.81 = 78,470.18 : x
2. Step 2: Convert to fraction form
   142,132.26/196,142.81 = 78,470.18/x
3. Step 3: Cross multiply
   142,132.26x = 196,142.81 × 78,470.18
4. Step 4: Simplify right side
   142,132.26x = 15,391,361,606.41
5. Step 5: Solve for x
   x = 15,391,361,606.41/142,132.26
6. Step 6: Final answer
   x = 108,289.01