Finding the Fourth Proportional to 10,666.15, 14,723.30 and 9,168.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,666.15 : 14,723.30 = 9,168.05 : x
2. Step 2: Convert to fraction form
   10,666.15/14,723.30 = 9,168.05/x
3. Step 3: Cross multiply
   10,666.15x = 14,723.30 × 9,168.05
4. Step 4: Simplify right side
   10,666.15x = 134,983,904.72
5. Step 5: Solve for x
   x = 134,983,904.72/10,666.15
6. Step 6: Final answer
   x = 12,655.36