Finding the Fourth Proportional to 142,112.72, 196,116.18 and 78,451.04

Step by Step Solution

1. Step 1: Write the proportion equation
   142,112.72 : 196,116.18 = 78,451.04 : x
2. Step 2: Convert to fraction form
   142,112.72/196,116.18 = 78,451.04/x
3. Step 3: Cross multiply
   142,112.72x = 196,116.18 × 78,451.04
4. Step 4: Simplify right side
   142,112.72x = 15,385,518,281.83
5. Step 5: Solve for x
   x = 15,385,518,281.83/142,112.72
6. Step 6: Final answer
   x = 108,262.78