Finding the Third Proportional to 678,398 and 1,054,944

Step by Step Solution

1. Step 1: Write the proportion equation
   678,398 : 1,054,944 = 1,054,944 : x
2. Step 2: Convert to fraction form
   678,398/1,054,944 = 1,054,944/x
3. Step 3: Cross multiply
   678,398x = 1,054,944 × 1,054,944
4. Step 4: Simplify right side
   678,398x = 1,112,906,843,136
5. Step 5: Solve for x
   x = 1,112,906,843,136/678,398
6. Step 6: Final answer
   x = 1,640,492.52