Finding the Fourth Proportional to 12,724.88, 17,558.72 and 7,418.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,724.88 : 17,558.72 = 7,418.38 : x
2. Step 2: Convert to fraction form
   12,724.88/17,558.72 = 7,418.38/x
3. Step 3: Cross multiply
   12,724.88x = 17,558.72 × 7,418.38
4. Step 4: Simplify right side
   12,724.88x = 130,257,257.27
5. Step 5: Solve for x
   x = 130,257,257.27/12,724.88
6. Step 6: Final answer
   x = 10,236.42