Finding the Third Proportional to 2,086,721 and 4,397,609

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086,721 : 4,397,609 = 4,397,609 : x
2. Step 2: Convert to fraction form
   2,086,721/4,397,609 = 4,397,609/x
3. Step 3: Cross multiply
   2,086,721x = 4,397,609 × 4,397,609
4. Step 4: Simplify right side
   2,086,721x = 19,338,964,916,881
5. Step 5: Solve for x
   x = 19,338,964,916,881/2,086,721
6. Step 6: Final answer
   x = 9,267,633.25