Finding the Fourth Proportional to 42.72, 63.99 and 32.58

Step by Step Solution

1. Step 1: Write the proportion equation
   42.72 : 63.99 = 32.58 : x
2. Step 2: Convert to fraction form
   42.72/63.99 = 32.58/x
3. Step 3: Cross multiply
   42.72x = 63.99 × 32.58
4. Step 4: Simplify right side
   42.72x = 2,084.79
5. Step 5: Solve for x
   x = 2,084.79/42.72
6. Step 6: Final answer
   x = 48.80