Finding the Fourth Proportional to 12,440.52, 17,169.56 and 7,134.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,440.52 : 17,169.56 = 7,134.30 : x
2. Step 2: Convert to fraction form
   12,440.52/17,169.56 = 7,134.30/x
3. Step 3: Cross multiply
   12,440.52x = 17,169.56 × 7,134.30
4. Step 4: Simplify right side
   12,440.52x = 122,492,791.91
5. Step 5: Solve for x
   x = 122,492,791.91/12,440.52
6. Step 6: Final answer
   x = 9,846.28