Finding the Fourth Proportional to 315,686.96, 435,642.52 and 172,443.32

Step by Step Solution

1. Step 1: Write the proportion equation
   315,686.96 : 435,642.52 = 172,443.32 : x
2. Step 2: Convert to fraction form
   315,686.96/435,642.52 = 172,443.32/x
3. Step 3: Cross multiply
   315,686.96x = 435,642.52 × 172,443.32
4. Step 4: Simplify right side
   315,686.96x = 75,123,642,481.97
5. Step 5: Solve for x
   x = 75,123,642,481.97/315,686.96
6. Step 6: Final answer
   x = 237,968.79