Finding the Third Proportional to 411.25 and 558.88

Step by Step Solution

1. Step 1: Write the proportion equation
   411.25 : 558.88 = 558.88 : x
2. Step 2: Convert to fraction form
   411.25/558.88 = 558.88/x
3. Step 3: Cross multiply
   411.25x = 558.88 × 558.88
4. Step 4: Simplify right side
   411.25x = 312,341.27
5. Step 5: Solve for x
   x = 312,341.27/411.25
6. Step 6: Final answer
   x = 759.49