Finding the Fourth Proportional to 10,434.79, 14,391.63 and 9,173.17

Step by Step Solution

1. Step 1: Write the proportion equation
   10,434.79 : 14,391.63 = 9,173.17 : x
2. Step 2: Convert to fraction form
   10,434.79/14,391.63 = 9,173.17/x
3. Step 3: Cross multiply
   10,434.79x = 14,391.63 × 9,173.17
4. Step 4: Simplify right side
   10,434.79x = 132,016,868.57
5. Step 5: Solve for x
   x = 132,016,868.57/10,434.79
6. Step 6: Final answer
   x = 12,651.61