Finding the Third Proportional to 244,258.50 and 321,918

Step by Step Solution

1. Step 1: Write the proportion equation
   244,258.50 : 321,918 = 321,918 : x
2. Step 2: Convert to fraction form
   244,258.50/321,918 = 321,918/x
3. Step 3: Cross multiply
   244,258.50x = 321,918 × 321,918
4. Step 4: Simplify right side
   244,258.50x = 103,631,198,724
5. Step 5: Solve for x
   x = 103,631,198,724/244,258.50
6. Step 6: Final answer
   x = 424,268.55