Finding the Fourth Proportional to 142,765.30, 213,687.15 and 131,706.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142,765.30 : 213,687.15 = 131,706.10 : x
2. Step 2: Convert to fraction form
   142,765.30/213,687.15 = 131,706.10/x
3. Step 3: Cross multiply
   142,765.30x = 213,687.15 × 131,706.10
4. Step 4: Simplify right side
   142,765.30x = 28,143,901,146.62
5. Step 5: Solve for x
   x = 28,143,901,146.62/142,765.30
6. Step 6: Final answer
   x = 197,134.05