Finding the Fourth Proportional to 142,149.98, 196,168.46 and 78,487.62

Step by Step Solution

1. Step 1: Write the proportion equation
   142,149.98 : 196,168.46 = 78,487.62 : x
2. Step 2: Convert to fraction form
   142,149.98/196,168.46 = 78,487.62/x
3. Step 3: Cross multiply
   142,149.98x = 196,168.46 × 78,487.62
4. Step 4: Simplify right side
   142,149.98x = 15,396,795,152.03
5. Step 5: Solve for x
   x = 15,396,795,152.03/142,149.98
6. Step 6: Final answer
   x = 108,313.74