Finding the Fourth Proportional to 85.36, 128.06 and 24.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85.36 : 128.06 = 24.50 : x
2. Step 2: Convert to fraction form
   85.36/128.06 = 24.50/x
3. Step 3: Cross multiply
   85.36x = 128.06 × 24.50
4. Step 4: Simplify right side
   85.36x = 3,136.89
5. Step 5: Solve for x
   x = 3,136.89/85.36
6. Step 6: Final answer
   x = 36.75