Finding the Fourth Proportional to 142,350, 196,441.56 and 78,684.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,350 : 196,441.56 = 78,684.72 : x
2. Step 2: Convert to fraction form
   142,350/196,441.56 = 78,684.72/x
3. Step 3: Cross multiply
   142,350x = 196,441.56 × 78,684.72
4. Step 4: Simplify right side
   142,350x = 15,456,949,144.96
5. Step 5: Solve for x
   x = 15,456,949,144.96/142,350
6. Step 6: Final answer
   x = 108,584.12