Finding the Fourth Proportional to 12,401.91, 17,129.48 and 9,039.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,401.91 : 17,129.48 = 9,039.33 : x
2. Step 2: Convert to fraction form
   12,401.91/17,129.48 = 9,039.33/x
3. Step 3: Cross multiply
   12,401.91x = 17,129.48 × 9,039.33
4. Step 4: Simplify right side
   12,401.91x = 154,838,977.25
5. Step 5: Solve for x
   x = 154,838,977.25/12,401.91
6. Step 6: Final answer
   x = 12,485.09