Finding the Fourth Proportional to 42.03, 63.18 and 33.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42.03 : 63.18 = 33.12 : x
2. Step 2: Convert to fraction form
   42.03/63.18 = 33.12/x
3. Step 3: Cross multiply
   42.03x = 63.18 × 33.12
4. Step 4: Simplify right side
   42.03x = 2,092.52
5. Step 5: Solve for x
   x = 2,092.52/42.03
6. Step 6: Final answer
   x = 49.79