Finding the Third Proportional to 5.25 and 10.69

Step by Step Solution

1. Step 1: Write the proportion equation
   5.25 : 10.69 = 10.69 : x
2. Step 2: Convert to fraction form
   5.25/10.69 = 10.69/x
3. Step 3: Cross multiply
   5.25x = 10.69 × 10.69
4. Step 4: Simplify right side
   5.25x = 114.22
5. Step 5: Solve for x
   x = 114.22/5.25
6. Step 6: Final answer
   x = 21.76