Finding the Fourth Proportional to 162,145.20, 243,367.31 and 82,239.24

Step by Step Solution

1. Step 1: Write the proportion equation
   162,145.20 : 243,367.31 = 82,239.24 : x
2. Step 2: Convert to fraction form
   162,145.20/243,367.31 = 82,239.24/x
3. Step 3: Cross multiply
   162,145.20x = 243,367.31 × 82,239.24
4. Step 4: Simplify right side
   162,145.20x = 20,014,343,579.27
5. Step 5: Solve for x
   x = 20,014,343,579.27/162,145.20
6. Step 6: Final answer
   x = 123,434.69