Finding the Fourth Proportional to 142,351.50, 196,443.63 and 78,686.22

Step by Step Solution

1. Step 1: Write the proportion equation
   142,351.50 : 196,443.63 = 78,686.22 : x
2. Step 2: Convert to fraction form
   142,351.50/196,443.63 = 78,686.22/x
3. Step 3: Cross multiply
   142,351.50x = 196,443.63 × 78,686.22
4. Step 4: Simplify right side
   142,351.50x = 15,457,406,687.78
5. Step 5: Solve for x
   x = 15,457,406,687.78/142,351.50
6. Step 6: Final answer
   x = 108,586.19