Finding the Third Proportional to 213.50 and 452.50

Step by Step Solution

1. Step 1: Write the proportion equation
   213.50 : 452.50 = 452.50 : x
2. Step 2: Convert to fraction form
   213.50/452.50 = 452.50/x
3. Step 3: Cross multiply
   213.50x = 452.50 × 452.50
4. Step 4: Simplify right side
   213.50x = 204,756.25
5. Step 5: Solve for x
   x = 204,756.25/213.50
6. Step 6: Final answer
   x = 959.05