Finding the Fourth Proportional to 16,617.92, 22,909.76 and 13,272

Step by Step Solution

1. Step 1: Write the proportion equation
   16,617.92 : 22,909.76 = 13,272 : x
2. Step 2: Convert to fraction form
   16,617.92/22,909.76 = 13,272/x
3. Step 3: Cross multiply
   16,617.92x = 22,909.76 × 13,272
4. Step 4: Simplify right side
   16,617.92x = 304,058,334.72
5. Step 5: Solve for x
   x = 304,058,334.72/16,617.92
6. Step 6: Final answer
   x = 18,297.02