Finding the Fourth Proportional to 315,731.18, 435,707.43 and 172,499.42

Step by Step Solution

1. Step 1: Write the proportion equation
   315,731.18 : 435,707.43 = 172,499.42 : x
2. Step 2: Convert to fraction form
   315,731.18/435,707.43 = 172,499.42/x
3. Step 3: Cross multiply
   315,731.18x = 435,707.43 × 172,499.42
4. Step 4: Simplify right side
   315,731.18x = 75,159,278,964.69
5. Step 5: Solve for x
   x = 75,159,278,964.69/315,731.18
6. Step 6: Final answer
   x = 238,048.33