Finding the Fourth Proportional to 10,916.72, 15,049.83 and 9,231.37

Step by Step Solution

1. Step 1: Write the proportion equation
   10,916.72 : 15,049.83 = 9,231.37 : x
2. Step 2: Convert to fraction form
   10,916.72/15,049.83 = 9,231.37/x
3. Step 3: Cross multiply
   10,916.72x = 15,049.83 × 9,231.37
4. Step 4: Simplify right side
   10,916.72x = 138,930,468.27
5. Step 5: Solve for x
   x = 138,930,468.27/10,916.72
6. Step 6: Final answer
   x = 12,726.39