Finding the Fourth Proportional to 85.59, 128.38 and 24.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85.59 : 128.38 = 24.72 : x
2. Step 2: Convert to fraction form
   85.59/128.38 = 24.72/x
3. Step 3: Cross multiply
   85.59x = 128.38 × 24.72
4. Step 4: Simplify right side
   85.59x = 3,173.55
5. Step 5: Solve for x
   x = 3,173.55/85.59
6. Step 6: Final answer
   x = 37.08