Finding the Third Proportional to 20.33 and 42.27

Step by Step Solution

1. Step 1: Write the proportion equation
   20.33 : 42.27 = 42.27 : x
2. Step 2: Convert to fraction form
   20.33/42.27 = 42.27/x
3. Step 3: Cross multiply
   20.33x = 42.27 × 42.27
4. Step 4: Simplify right side
   20.33x = 1,786.68
5. Step 5: Solve for x
   x = 1,786.68/20.33
6. Step 6: Final answer
   x = 87.88