Finding the Third Proportional to 308.25 and 831.38

Step by Step Solution

1. Step 1: Write the proportion equation
   308.25 : 831.38 = 831.38 : x
2. Step 2: Convert to fraction form
   308.25/831.38 = 831.38/x
3. Step 3: Cross multiply
   308.25x = 831.38 × 831.38
4. Step 4: Simplify right side
   308.25x = 691,184.39
5. Step 5: Solve for x
   x = 691,184.39/308.25
6. Step 6: Final answer
   x = 2,242.29