Finding the Third Proportional to 2,643 and 5,718

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643 : 5,718 = 5,718 : x
2. Step 2: Convert to fraction form
   2,643/5,718 = 5,718/x
3. Step 3: Cross multiply
   2,643x = 5,718 × 5,718
4. Step 4: Simplify right side
   2,643x = 32,695,524
5. Step 5: Solve for x
   x = 32,695,524/2,643
6. Step 6: Final answer
   x = 12,370.61