Finding the Fourth Proportional to 11,028.31, 16,540.72 and 9,166.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,028.31 : 16,540.72 = 9,166.15 : x
2. Step 2: Convert to fraction form
   11,028.31/16,540.72 = 9,166.15/x
3. Step 3: Cross multiply
   11,028.31x = 16,540.72 × 9,166.15
4. Step 4: Simplify right side
   11,028.31x = 151,614,816.47
5. Step 5: Solve for x
   x = 151,614,816.47/11,028.31
6. Step 6: Final answer
   x = 13,747.78