Finding the Third Proportional to 2,021,809 and 4,397,891

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021,809 : 4,397,891 = 4,397,891 : x
2. Step 2: Convert to fraction form
   2,021,809/4,397,891 = 4,397,891/x
3. Step 3: Cross multiply
   2,021,809x = 4,397,891 × 4,397,891
4. Step 4: Simplify right side
   2,021,809x = 19,341,445,247,881
5. Step 5: Solve for x
   x = 19,341,445,247,881/2,021,809
6. Step 6: Final answer
   x = 9,566,405.75