Finding the Third Proportional to 2,220,678 and 4,615,816

Step by Step Solution

1. Step 1: Write the proportion equation
   2,220,678 : 4,615,816 = 4,615,816 : x
2. Step 2: Convert to fraction form
   2,220,678/4,615,816 = 4,615,816/x
3. Step 3: Cross multiply
   2,220,678x = 4,615,816 × 4,615,816
4. Step 4: Simplify right side
   2,220,678x = 21,305,757,345,856
5. Step 5: Solve for x
   x = 21,305,757,345,856/2,220,678
6. Step 6: Final answer
   x = 9,594,257.86