Finding the Third Proportional to 11,415 and 12,495

Step by Step Solution

1. Step 1: Write the proportion equation
   11,415 : 12,495 = 12,495 : x
2. Step 2: Convert to fraction form
   11,415/12,495 = 12,495/x
3. Step 3: Cross multiply
   11,415x = 12,495 × 12,495
4. Step 4: Simplify right side
   11,415x = 156,125,025
5. Step 5: Solve for x
   x = 156,125,025/11,415
6. Step 6: Final answer
   x = 13,677.18