Finding the Third Proportional to 2,780 and 5,716

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780 : 5,716 = 5,716 : x
2. Step 2: Convert to fraction form
   2,780/5,716 = 5,716/x
3. Step 3: Cross multiply
   2,780x = 5,716 × 5,716
4. Step 4: Simplify right side
   2,780x = 32,672,656
5. Step 5: Solve for x
   x = 32,672,656/2,780
6. Step 6: Final answer
   x = 11,752.75