Finding the Third Proportional to 321.75 and 464.50

Step by Step Solution

1. Step 1: Write the proportion equation
   321.75 : 464.50 = 464.50 : x
2. Step 2: Convert to fraction form
   321.75/464.50 = 464.50/x
3. Step 3: Cross multiply
   321.75x = 464.50 × 464.50
4. Step 4: Simplify right side
   321.75x = 215,760.25
5. Step 5: Solve for x
   x = 215,760.25/321.75
6. Step 6: Final answer
   x = 670.58