Finding the Third Proportional to 12,398 and 25,802

Step by Step Solution

1. Step 1: Write the proportion equation
   12,398 : 25,802 = 25,802 : x
2. Step 2: Convert to fraction form
   12,398/25,802 = 25,802/x
3. Step 3: Cross multiply
   12,398x = 25,802 × 25,802
4. Step 4: Simplify right side
   12,398x = 665,743,204
5. Step 5: Solve for x
   x = 665,743,204/12,398
6. Step 6: Final answer
   x = 53,697.63