Finding the Fourth Proportional to 10,434.27, 14,390.92 and 9,172.65

Step by Step Solution

1. Step 1: Write the proportion equation
   10,434.27 : 14,390.92 = 9,172.65 : x
2. Step 2: Convert to fraction form
   10,434.27/14,390.92 = 9,172.65/x
3. Step 3: Cross multiply
   10,434.27x = 14,390.92 × 9,172.65
4. Step 4: Simplify right side
   10,434.27x = 132,002,937.77
5. Step 5: Solve for x
   x = 132,002,937.77/10,434.27
6. Step 6: Final answer
   x = 12,650.90