Finding the Third Proportional to 456 and 682.50

Step by Step Solution

1. Step 1: Write the proportion equation
   456 : 682.50 = 682.50 : x
2. Step 2: Convert to fraction form
   456/682.50 = 682.50/x
3. Step 3: Cross multiply
   456x = 682.50 × 682.50
4. Step 4: Simplify right side
   456x = 465,806.25
5. Step 5: Solve for x
   x = 465,806.25/456
6. Step 6: Final answer
   x = 1,021.50