Finding the Fourth Proportional to 142,116.62, 196,121.31 and 78,454.41

Step by Step Solution

1. Step 1: Write the proportion equation
   142,116.62 : 196,121.31 = 78,454.41 : x
2. Step 2: Convert to fraction form
   142,116.62/196,121.31 = 78,454.41/x
3. Step 3: Cross multiply
   142,116.62x = 196,121.31 × 78,454.41
4. Step 4: Simplify right side
   142,116.62x = 15,386,581,664.48
5. Step 5: Solve for x
   x = 15,386,581,664.48/142,116.62
6. Step 6: Final answer
   x = 108,267.30