Finding the Fourth Proportional to 11,915.56, 16,443.60 and 6,610.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,915.56 : 16,443.60 = 6,610.72 : x
2. Step 2: Convert to fraction form
   11,915.56/16,443.60 = 6,610.72/x
3. Step 3: Cross multiply
   11,915.56x = 16,443.60 × 6,610.72
4. Step 4: Simplify right side
   11,915.56x = 108,704,035.39
5. Step 5: Solve for x
   x = 108,704,035.39/11,915.56
6. Step 6: Final answer
   x = 9,122.86