Finding the Fourth Proportional to 85.52, 128.25 and 32.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85.52 : 128.25 = 32.72 : x
2. Step 2: Convert to fraction form
   85.52/128.25 = 32.72/x
3. Step 3: Cross multiply
   85.52x = 128.25 × 32.72
4. Step 4: Simplify right side
   85.52x = 4,196.30
5. Step 5: Solve for x
   x = 4,196.30/85.52
6. Step 6: Final answer
   x = 49.07