Finding the Fourth Proportional to 16.50, 24.72 and 13.62

Step by Step Solution

1. Step 1: Write the proportion equation
   16.50 : 24.72 = 13.62 : x
2. Step 2: Convert to fraction form
   16.50/24.72 = 13.62/x
3. Step 3: Cross multiply
   16.50x = 24.72 × 13.62
4. Step 4: Simplify right side
   16.50x = 336.69
5. Step 5: Solve for x
   x = 336.69/16.50
6. Step 6: Final answer
   x = 20.41