Finding the Fourth Proportional to 42.18, 63.23 and 16.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42.18 : 63.23 = 16.50 : x
2. Step 2: Convert to fraction form
   42.18/63.23 = 16.50/x
3. Step 3: Cross multiply
   42.18x = 63.23 × 16.50
4. Step 4: Simplify right side
   42.18x = 1,042.92
5. Step 5: Solve for x
   x = 1,042.92/42.18
6. Step 6: Final answer
   x = 24.72