Finding the Fourth Proportional to 20,915.46, 31,363.98 and 9,825.30

Step by Step Solution

1. Step 1: Write the proportion equation
   20,915.46 : 31,363.98 = 9,825.30 : x
2. Step 2: Convert to fraction form
   20,915.46/31,363.98 = 9,825.30/x
3. Step 3: Cross multiply
   20,915.46x = 31,363.98 × 9,825.30
4. Step 4: Simplify right side
   20,915.46x = 308,160,512.69
5. Step 5: Solve for x
   x = 308,160,512.69/20,915.46
6. Step 6: Final answer
   x = 14,733.62