Finding the Third Proportional to 308,920 and 676,944

Step by Step Solution

1. Step 1: Write the proportion equation
   308,920 : 676,944 = 676,944 : x
2. Step 2: Convert to fraction form
   308,920/676,944 = 676,944/x
3. Step 3: Cross multiply
   308,920x = 676,944 × 676,944
4. Step 4: Simplify right side
   308,920x = 458,253,179,136
5. Step 5: Solve for x
   x = 458,253,179,136/308,920
6. Step 6: Final answer
   x = 1,483,404.05