Finding the Fourth Proportional to 12,403.41, 17,131.55 and 9,040.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,403.41 : 17,131.55 = 9,040.83 : x
2. Step 2: Convert to fraction form
   12,403.41/17,131.55 = 9,040.83/x
3. Step 3: Cross multiply
   12,403.41x = 17,131.55 × 9,040.83
4. Step 4: Simplify right side
   12,403.41x = 154,883,385.98
5. Step 5: Solve for x
   x = 154,883,385.98/12,403.41
6. Step 6: Final answer
   x = 12,487.16