Finding the Fourth Proportional to 13,383.43, 18,469.72 and 7,415.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,383.43 : 18,469.72 = 7,415.09 : x
2. Step 2: Convert to fraction form
   13,383.43/18,469.72 = 7,415.09/x
3. Step 3: Cross multiply
   13,383.43x = 18,469.72 × 7,415.09
4. Step 4: Simplify right side
   13,383.43x = 136,954,726.15
5. Step 5: Solve for x
   x = 136,954,726.15/13,383.43
6. Step 6: Final answer
   x = 10,233.16