Finding the Third Proportional to 2,618 and 5,540

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618 : 5,540 = 5,540 : x
2. Step 2: Convert to fraction form
   2,618/5,540 = 5,540/x
3. Step 3: Cross multiply
   2,618x = 5,540 × 5,540
4. Step 4: Simplify right side
   2,618x = 30,691,600
5. Step 5: Solve for x
   x = 30,691,600/2,618
6. Step 6: Final answer
   x = 11,723.30