Finding the Third Proportional to 21.16 and 32.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21.16 : 32.78 = 32.78 : x
2. Step 2: Convert to fraction form
   21.16/32.78 = 32.78/x
3. Step 3: Cross multiply
   21.16x = 32.78 × 32.78
4. Step 4: Simplify right side
   21.16x = 1,074.61
5. Step 5: Solve for x
   x = 1,074.61/21.16
6. Step 6: Final answer
   x = 50.79