Finding the Third Proportional to 1,021,907 and 2,149,678

Step by Step Solution

1. Step 1: Write the proportion equation
   1,021,907 : 2,149,678 = 2,149,678 : x
2. Step 2: Convert to fraction form
   1,021,907/2,149,678 = 2,149,678/x
3. Step 3: Cross multiply
   1,021,907x = 2,149,678 × 2,149,678
4. Step 4: Simplify right side
   1,021,907x = 4,621,115,503,684
5. Step 5: Solve for x
   x = 4,621,115,503,684/1,021,907
6. Step 6: Final answer
   x = 4,522,050.93