Finding the Third Proportional to 1,387,838 and 3,212,644

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387,838 : 3,212,644 = 3,212,644 : x
2. Step 2: Convert to fraction form
   1,387,838/3,212,644 = 3,212,644/x
3. Step 3: Cross multiply
   1,387,838x = 3,212,644 × 3,212,644
4. Step 4: Simplify right side
   1,387,838x = 10,321,081,470,736
5. Step 5: Solve for x
   x = 10,321,081,470,736/1,387,838
6. Step 6: Final answer
   x = 7,436,805.64