Finding the Third Proportional to 2,828 and 5,422

Step by Step Solution

1. Step 1: Write the proportion equation
   2,828 : 5,422 = 5,422 : x
2. Step 2: Convert to fraction form
   2,828/5,422 = 5,422/x
3. Step 3: Cross multiply
   2,828x = 5,422 × 5,422
4. Step 4: Simplify right side
   2,828x = 29,398,084
5. Step 5: Solve for x
   x = 29,398,084/2,828
6. Step 6: Final answer
   x = 10,395.36