Finding the Fourth Proportional to 12,665.40, 17,480.40 and 7,363.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,665.40 : 17,480.40 = 7,363.29 : x
2. Step 2: Convert to fraction form
   12,665.40/17,480.40 = 7,363.29/x
3. Step 3: Cross multiply
   12,665.40x = 17,480.40 × 7,363.29
4. Step 4: Simplify right side
   12,665.40x = 128,713,254.52
5. Step 5: Solve for x
   x = 128,713,254.52/12,665.40
6. Step 6: Final answer
   x = 10,162.59