Finding the Third Proportional to 2,139,788 and 4,616,616

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,788 : 4,616,616 = 4,616,616 : x
2. Step 2: Convert to fraction form
   2,139,788/4,616,616 = 4,616,616/x
3. Step 3: Cross multiply
   2,139,788x = 4,616,616 × 4,616,616
4. Step 4: Simplify right side
   2,139,788x = 21,313,143,291,456
5. Step 5: Solve for x
   x = 21,313,143,291,456/2,139,788
6. Step 6: Final answer
   x = 9,960,399.48