Finding the Third Proportional to 21.88 and 34.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21.88 : 34.38 = 34.38 : x
2. Step 2: Convert to fraction form
   21.88/34.38 = 34.38/x
3. Step 3: Cross multiply
   21.88x = 34.38 × 34.38
4. Step 4: Simplify right side
   21.88x = 1,181.64
5. Step 5: Solve for x
   x = 1,181.64/21.88
6. Step 6: Final answer
   x = 54.02