Finding the Third Proportional to 2,713.50 and 5,687.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,713.50 : 5,687.72 = 5,687.72 : x
2. Step 2: Convert to fraction form
   2,713.50/5,687.72 = 5,687.72/x
3. Step 3: Cross multiply
   2,713.50x = 5,687.72 × 5,687.72
4. Step 4: Simplify right side
   2,713.50x = 32,350,144.58
5. Step 5: Solve for x
   x = 32,350,144.58/2,713.50
6. Step 6: Final answer
   x = 11,921.93