Finding the Fourth Proportional to 12,540.86, 17,306.94 and 7,504.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,540.86 : 17,306.94 = 7,504.12 : x
2. Step 2: Convert to fraction form
   12,540.86/17,306.94 = 7,504.12/x
3. Step 3: Cross multiply
   12,540.86x = 17,306.94 × 7,504.12
4. Step 4: Simplify right side
   12,540.86x = 129,873,302.93
5. Step 5: Solve for x
   x = 129,873,302.93/12,540.86
6. Step 6: Final answer
   x = 10,356.01