Finding the Third Proportional to 21.50 and 41.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21.50 : 41.38 = 41.38 : x
2. Step 2: Convert to fraction form
   21.50/41.38 = 41.38/x
3. Step 3: Cross multiply
   21.50x = 41.38 × 41.38
4. Step 4: Simplify right side
   21.50x = 1,711.89
5. Step 5: Solve for x
   x = 1,711.89/21.50
6. Step 6: Final answer
   x = 79.62