Finding the Third Proportional to 10,440 and 12,087

Step by Step Solution

1. Step 1: Write the proportion equation
   10,440 : 12,087 = 12,087 : x
2. Step 2: Convert to fraction form
   10,440/12,087 = 12,087/x
3. Step 3: Cross multiply
   10,440x = 12,087 × 12,087
4. Step 4: Simplify right side
   10,440x = 146,095,569
5. Step 5: Solve for x
   x = 146,095,569/10,440
6. Step 6: Final answer
   x = 13,993.83