Finding the Fourth Proportional to 10,665.15, 14,721.92 and 9,167.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,665.15 : 14,721.92 = 9,167.05 : x
2. Step 2: Convert to fraction form
   10,665.15/14,721.92 = 9,167.05/x
3. Step 3: Cross multiply
   10,665.15x = 14,721.92 × 9,167.05
4. Step 4: Simplify right side
   10,665.15x = 134,956,530.90
5. Step 5: Solve for x
   x = 134,956,530.90/10,665.15
6. Step 6: Final answer
   x = 12,653.98