Finding the Third Proportional to 1,998,618 and 4,395,816

Step by Step Solution

1. Step 1: Write the proportion equation
   1,998,618 : 4,395,816 = 4,395,816 : x
2. Step 2: Convert to fraction form
   1,998,618/4,395,816 = 4,395,816/x
3. Step 3: Cross multiply
   1,998,618x = 4,395,816 × 4,395,816
4. Step 4: Simplify right side
   1,998,618x = 19,323,198,305,856
5. Step 5: Solve for x
   x = 19,323,198,305,856/1,998,618
6. Step 6: Final answer
   x = 9,668,279.93