Finding the Fourth Proportional to 85.58, 128.38 and 24.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85.58 : 128.38 = 24.72 : x
2. Step 2: Convert to fraction form
   85.58/128.38 = 24.72/x
3. Step 3: Cross multiply
   85.58x = 128.38 × 24.72
4. Step 4: Simplify right side
   85.58x = 3,173.73
5. Step 5: Solve for x
   x = 3,173.73/85.58
6. Step 6: Final answer
   x = 37.08