Finding the Third Proportional to 900,618 and 1,380,879

Step by Step Solution

1. Step 1: Write the proportion equation
   900,618 : 1,380,879 = 1,380,879 : x
2. Step 2: Convert to fraction form
   900,618/1,380,879 = 1,380,879/x
3. Step 3: Cross multiply
   900,618x = 1,380,879 × 1,380,879
4. Step 4: Simplify right side
   900,618x = 1,906,826,812,641
5. Step 5: Solve for x
   x = 1,906,826,812,641/900,618
6. Step 6: Final answer
   x = 2,117,242.62