Finding the Fourth Proportional to 315,545.76, 435,456.72 and 172,307.52

Step by Step Solution

1. Step 1: Write the proportion equation
   315,545.76 : 435,456.72 = 172,307.52 : x
2. Step 2: Convert to fraction form
   315,545.76/435,456.72 = 172,307.52/x
3. Step 3: Cross multiply
   315,545.76x = 435,456.72 × 172,307.52
4. Step 4: Simplify right side
   315,545.76x = 75,032,467,490.53
5. Step 5: Solve for x
   x = 75,032,467,490.53/315,545.76
6. Step 6: Final answer
   x = 237,786.33