Finding the Fourth Proportional to 142,350.50, 196,442.25 and 78,685.22

Step by Step Solution

1. Step 1: Write the proportion equation
   142,350.50 : 196,442.25 = 78,685.22 : x
2. Step 2: Convert to fraction form
   142,350.50/196,442.25 = 78,685.22/x
3. Step 3: Cross multiply
   142,350.50x = 196,442.25 × 78,685.22
4. Step 4: Simplify right side
   142,350.50x = 15,457,101,658.55
5. Step 5: Solve for x
   x = 15,457,101,658.55/142,350.50
6. Step 6: Final answer
   x = 108,584.81