Finding the Third Proportional to 2,559 and 3,912.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559 : 3,912.75 = 3,912.75 : x
2. Step 2: Convert to fraction form
   2,559/3,912.75 = 3,912.75/x
3. Step 3: Cross multiply
   2,559x = 3,912.75 × 3,912.75
4. Step 4: Simplify right side
   2,559x = 15,309,612.56
5. Step 5: Solve for x
   x = 15,309,612.56/2,559
6. Step 6: Final answer
   x = 5,982.65