Finding the Fourth Proportional to 315,815.71, 435,826.82 and 172,575.76

Step by Step Solution

1. Step 1: Write the proportion equation
   315,815.71 : 435,826.82 = 172,575.76 : x
2. Step 2: Convert to fraction form
   315,815.71/435,826.82 = 172,575.76/x
3. Step 3: Cross multiply
   315,815.71x = 435,826.82 × 172,575.76
4. Step 4: Simplify right side
   315,815.71x = 75,213,144,689.88
5. Step 5: Solve for x
   x = 75,213,144,689.88/315,815.71
6. Step 6: Final answer
   x = 238,155.17