Finding the Fourth Proportional to 142,151.98, 196,171.22 and 78,489.62

Step by Step Solution

1. Step 1: Write the proportion equation
   142,151.98 : 196,171.22 = 78,489.62 : x
2. Step 2: Convert to fraction form
   142,151.98/196,171.22 = 78,489.62/x
3. Step 3: Cross multiply
   142,151.98x = 196,171.22 × 78,489.62
4. Step 4: Simplify right side
   142,151.98x = 15,397,404,512.74
5. Step 5: Solve for x
   x = 15,397,404,512.74/142,151.98
6. Step 6: Final answer
   x = 108,316.50