Finding the Third Proportional to 3,111.75 and 5,717.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.75 : 5,717.25 = 5,717.25 : x
2. Step 2: Convert to fraction form
   3,111.75/5,717.25 = 5,717.25/x
3. Step 3: Cross multiply
   3,111.75x = 5,717.25 × 5,717.25
4. Step 4: Simplify right side
   3,111.75x = 32,686,947.56
5. Step 5: Solve for x
   x = 32,686,947.56/3,111.75
6. Step 6: Final answer
   x = 10,504.36