Finding the Third Proportional to 411.75 and 533.25

Step by Step Solution

1. Step 1: Write the proportion equation
   411.75 : 533.25 = 533.25 : x
2. Step 2: Convert to fraction form
   411.75/533.25 = 533.25/x
3. Step 3: Cross multiply
   411.75x = 533.25 × 533.25
4. Step 4: Simplify right side
   411.75x = 284,355.56
5. Step 5: Solve for x
   x = 284,355.56/411.75
6. Step 6: Final answer
   x = 690.60