Finding the Third Proportional to 20.55 and 40.41

Step by Step Solution

1. Step 1: Write the proportion equation
   20.55 : 40.41 = 40.41 : x
2. Step 2: Convert to fraction form
   20.55/40.41 = 40.41/x
3. Step 3: Cross multiply
   20.55x = 40.41 × 40.41
4. Step 4: Simplify right side
   20.55x = 1,633.29
5. Step 5: Solve for x
   x = 1,633.29/20.55
6. Step 6: Final answer
   x = 79.48