Finding the Third Proportional to 644,736 and 1,384,616

Step by Step Solution

1. Step 1: Write the proportion equation
   644,736 : 1,384,616 = 1,384,616 : x
2. Step 2: Convert to fraction form
   644,736/1,384,616 = 1,384,616/x
3. Step 3: Cross multiply
   644,736x = 1,384,616 × 1,384,616
4. Step 4: Simplify right side
   644,736x = 1,917,161,467,456
5. Step 5: Solve for x
   x = 1,917,161,467,456/644,736
6. Step 6: Final answer
   x = 2,973,560.45