Finding the Third Proportional to 217.38 and 452.72

Step by Step Solution

1. Step 1: Write the proportion equation
   217.38 : 452.72 = 452.72 : x
2. Step 2: Convert to fraction form
   217.38/452.72 = 452.72/x
3. Step 3: Cross multiply
   217.38x = 452.72 × 452.72
4. Step 4: Simplify right side
   217.38x = 204,954.27
5. Step 5: Solve for x
   x = 204,954.27/217.38
6. Step 6: Final answer
   x = 942.86