Finding the Fourth Proportional to 12,449.56, 17,179.50 and 7,144.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,449.56 : 17,179.50 = 7,144.24 : x
2. Step 2: Convert to fraction form
   12,449.56/17,179.50 = 7,144.24/x
3. Step 3: Cross multiply
   12,449.56x = 17,179.50 × 7,144.24
4. Step 4: Simplify right side
   12,449.56x = 122,734,471.08
5. Step 5: Solve for x
   x = 122,734,471.08/12,449.56
6. Step 6: Final answer
   x = 9,858.54