Finding the Third Proportional to 10,890 and 12,366

Step by Step Solution

1. Step 1: Write the proportion equation
   10,890 : 12,366 = 12,366 : x
2. Step 2: Convert to fraction form
   10,890/12,366 = 12,366/x
3. Step 3: Cross multiply
   10,890x = 12,366 × 12,366
4. Step 4: Simplify right side
   10,890x = 152,917,956
5. Step 5: Solve for x
   x = 152,917,956/10,890
6. Step 6: Final answer
   x = 14,042.05