Finding the Third Proportional to 678,412 and 1,054,974

Step by Step Solution

1. Step 1: Write the proportion equation
   678,412 : 1,054,974 = 1,054,974 : x
2. Step 2: Convert to fraction form
   678,412/1,054,974 = 1,054,974/x
3. Step 3: Cross multiply
   678,412x = 1,054,974 × 1,054,974
4. Step 4: Simplify right side
   678,412x = 1,112,970,140,676
5. Step 5: Solve for x
   x = 1,112,970,140,676/678,412
6. Step 6: Final answer
   x = 1,640,551.97