Finding the Fourth Proportional to 12,418.71, 17,144.17 and 9,579.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,418.71 : 17,144.17 = 9,579.72 : x
2. Step 2: Convert to fraction form
   12,418.71/17,144.17 = 9,579.72/x
3. Step 3: Cross multiply
   12,418.71x = 17,144.17 × 9,579.72
4. Step 4: Simplify right side
   12,418.71x = 164,236,348.23
5. Step 5: Solve for x
   x = 164,236,348.23/12,418.71
6. Step 6: Final answer
   x = 13,224.91