Finding the Third Proportional to 115.25 and 243.38

Step by Step Solution

1. Step 1: Write the proportion equation
   115.25 : 243.38 = 243.38 : x
2. Step 2: Convert to fraction form
   115.25/243.38 = 243.38/x
3. Step 3: Cross multiply
   115.25x = 243.38 × 243.38
4. Step 4: Simplify right side
   115.25x = 59,231.39
5. Step 5: Solve for x
   x = 59,231.39/115.25
6. Step 6: Final answer
   x = 513.94