Finding the Fourth Proportional to 42.39, 63.45 and 32.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42.39 : 63.45 = 32.15 : x
2. Step 2: Convert to fraction form
   42.39/63.45 = 32.15/x
3. Step 3: Cross multiply
   42.39x = 63.45 × 32.15
4. Step 4: Simplify right side
   42.39x = 2,039.60
5. Step 5: Solve for x
   x = 2,039.60/42.39
6. Step 6: Final answer
   x = 48.12