Finding the Fourth Proportional to 10,434.29, 14,390.94 and 9,172.67

Step by Step Solution

1. Step 1: Write the proportion equation
   10,434.29 : 14,390.94 = 9,172.67 : x
2. Step 2: Convert to fraction form
   10,434.29/14,390.94 = 9,172.67/x
3. Step 3: Cross multiply
   10,434.29x = 14,390.94 × 9,172.67
4. Step 4: Simplify right side
   10,434.29x = 132,003,366.54
5. Step 5: Solve for x
   x = 132,003,366.54/10,434.29
6. Step 6: Final answer
   x = 12,650.92