Finding the Fourth Proportional to 42.32, 63.18 and 33.21

Step by Step Solution

1. Step 1: Write the proportion equation
   42.32 : 63.18 = 33.21 : x
2. Step 2: Convert to fraction form
   42.32/63.18 = 33.21/x
3. Step 3: Cross multiply
   42.32x = 63.18 × 33.21
4. Step 4: Simplify right side
   42.32x = 2,098.21
5. Step 5: Solve for x
   x = 2,098.21/42.32
6. Step 6: Final answer
   x = 49.58