Finding the Third Proportional to 20.78 and 32.91

Step by Step Solution

1. Step 1: Write the proportion equation
   20.78 : 32.91 = 32.91 : x
2. Step 2: Convert to fraction form
   20.78/32.91 = 32.91/x
3. Step 3: Cross multiply
   20.78x = 32.91 × 32.91
4. Step 4: Simplify right side
   20.78x = 1,082.82
5. Step 5: Solve for x
   x = 1,082.82/20.78
6. Step 6: Final answer
   x = 52.11