Finding the Fourth Proportional to 9,915.12, 14,872.78 and 3,251.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,915.12 : 14,872.78 = 3,251.52 : x
2. Step 2: Convert to fraction form
   9,915.12/14,872.78 = 3,251.52/x
3. Step 3: Cross multiply
   9,915.12x = 14,872.78 × 3,251.52
4. Step 4: Simplify right side
   9,915.12x = 48,359,141.63
5. Step 5: Solve for x
   x = 48,359,141.63/9,915.12
6. Step 6: Final answer
   x = 4,877.31