Finding the Third Proportional to 1,009,779 and 2,161,407

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009,779 : 2,161,407 = 2,161,407 : x
2. Step 2: Convert to fraction form
   1,009,779/2,161,407 = 2,161,407/x
3. Step 3: Cross multiply
   1,009,779x = 2,161,407 × 2,161,407
4. Step 4: Simplify right side
   1,009,779x = 4,671,680,219,649
5. Step 5: Solve for x
   x = 4,671,680,219,649/1,009,779
6. Step 6: Final answer
   x = 4,626,438.28