Finding the Third Proportional to 12,408 and 18,116

Step by Step Solution

1. Step 1: Write the proportion equation
   12,408 : 18,116 = 18,116 : x
2. Step 2: Convert to fraction form
   12,408/18,116 = 18,116/x
3. Step 3: Cross multiply
   12,408x = 18,116 × 18,116
4. Step 4: Simplify right side
   12,408x = 328,189,456
5. Step 5: Solve for x
   x = 328,189,456/12,408
6. Step 6: Final answer
   x = 26,449.83