Finding the Fourth Proportional to 42.24, 63.27 and 33.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42.24 : 63.27 = 33.18 : x
2. Step 2: Convert to fraction form
   42.24/63.27 = 33.18/x
3. Step 3: Cross multiply
   42.24x = 63.27 × 33.18
4. Step 4: Simplify right side
   42.24x = 2,099.30
5. Step 5: Solve for x
   x = 2,099.30/42.24
6. Step 6: Final answer
   x = 49.70