Finding the Third Proportional to 12,408 and 12,408

Step by Step Solution

1. Step 1: Write the proportion equation
   12,408 : 12,408 = 12,408 : x
2. Step 2: Convert to fraction form
   12,408/12,408 = 12,408/x
3. Step 3: Cross multiply
   12,408x = 12,408 × 12,408
4. Step 4: Simplify right side
   12,408x = 153,958,464
5. Step 5: Solve for x
   x = 153,958,464/12,408
6. Step 6: Final answer
   x = 12,408