Finding the Fourth Proportional to 42.18, 63.21 and 24.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42.18 : 63.21 = 24.15 : x
2. Step 2: Convert to fraction form
   42.18/63.21 = 24.15/x
3. Step 3: Cross multiply
   42.18x = 63.21 × 24.15
4. Step 4: Simplify right side
   42.18x = 1,526.52
5. Step 5: Solve for x
   x = 1,526.52/42.18
6. Step 6: Final answer
   x = 36.19