Finding the Third Proportional to 132.25 and 287.38

Step by Step Solution

1. Step 1: Write the proportion equation
   132.25 : 287.38 = 287.38 : x
2. Step 2: Convert to fraction form
   132.25/287.38 = 287.38/x
3. Step 3: Cross multiply
   132.25x = 287.38 × 287.38
4. Step 4: Simplify right side
   132.25x = 82,584.39
5. Step 5: Solve for x
   x = 82,584.39/132.25
6. Step 6: Final answer
   x = 624.46