Finding the Fourth Proportional to 11,016.72, 16,527.24 and 9,915.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,016.72 : 16,527.24 = 9,915.12 : x
2. Step 2: Convert to fraction form
   11,016.72/16,527.24 = 9,915.12/x
3. Step 3: Cross multiply
   11,016.72x = 16,527.24 × 9,915.12
4. Step 4: Simplify right side
   11,016.72x = 163,869,567.87
5. Step 5: Solve for x
   x = 163,869,567.87/11,016.72
6. Step 6: Final answer
   x = 14,874.62