Finding the Third Proportional to 11,379 and 12,459

Step by Step Solution

1. Step 1: Write the proportion equation
   11,379 : 12,459 = 12,459 : x
2. Step 2: Convert to fraction form
   11,379/12,459 = 12,459/x
3. Step 3: Cross multiply
   11,379x = 12,459 × 12,459
4. Step 4: Simplify right side
   11,379x = 155,226,681
5. Step 5: Solve for x
   x = 155,226,681/11,379
6. Step 6: Final answer
   x = 13,641.50