Finding the Fourth Proportional to 13,408.26, 18,502.92 and 7,440.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,408.26 : 18,502.92 = 7,440.18 : x
2. Step 2: Convert to fraction form
   13,408.26/18,502.92 = 7,440.18/x
3. Step 3: Cross multiply
   13,408.26x = 18,502.92 × 7,440.18
4. Step 4: Simplify right side
   13,408.26x = 137,665,055.33
5. Step 5: Solve for x
   x = 137,665,055.33/13,408.26
6. Step 6: Final answer
   x = 10,267.18