Finding the Third Proportional to 411.25 and 610.75

Step by Step Solution

1. Step 1: Write the proportion equation
   411.25 : 610.75 = 610.75 : x
2. Step 2: Convert to fraction form
   411.25/610.75 = 610.75/x
3. Step 3: Cross multiply
   411.25x = 610.75 × 610.75
4. Step 4: Simplify right side
   411.25x = 373,015.56
5. Step 5: Solve for x
   x = 373,015.56/411.25
6. Step 6: Final answer
   x = 907.03