Finding the Third Proportional to 10.38 and 21.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10.38 : 21.69 = 21.69 : x
2. Step 2: Convert to fraction form
   10.38/21.69 = 21.69/x
3. Step 3: Cross multiply
   10.38x = 21.69 × 21.69
4. Step 4: Simplify right side
   10.38x = 470.35
5. Step 5: Solve for x
   x = 470.35/10.38
6. Step 6: Final answer
   x = 45.33