Finding the Fourth Proportional to 142,585.72, 196,789 and 82,144.60

Step by Step Solution

1. Step 1: Write the proportion equation
   142,585.72 : 196,789 = 82,144.60 : x
2. Step 2: Convert to fraction form
   142,585.72/196,789 = 82,144.60/x
3. Step 3: Cross multiply
   142,585.72x = 196,789 × 82,144.60
4. Step 4: Simplify right side
   142,585.72x = 16,165,153,689.40
5. Step 5: Solve for x
   x = 16,165,153,689.40/142,585.72
6. Step 6: Final answer
   x = 113,371.48