Finding the Fourth Proportional to 11,915.72, 16,443.78 and 6,610.63

Step by Step Solution

1. Step 1: Write the proportion equation
   11,915.72 : 16,443.78 = 6,610.63 : x
2. Step 2: Convert to fraction form
   11,915.72/16,443.78 = 6,610.63/x
3. Step 3: Cross multiply
   11,915.72x = 16,443.78 × 6,610.63
4. Step 4: Simplify right side
   11,915.72x = 108,703,745.38
5. Step 5: Solve for x
   x = 108,703,745.38/11,915.72
6. Step 6: Final answer
   x = 9,122.72