Finding the Third Proportional to 644,909 and 1,366,648

Step by Step Solution

1. Step 1: Write the proportion equation
   644,909 : 1,366,648 = 1,366,648 : x
2. Step 2: Convert to fraction form
   644,909/1,366,648 = 1,366,648/x
3. Step 3: Cross multiply
   644,909x = 1,366,648 × 1,366,648
4. Step 4: Simplify right side
   644,909x = 1,867,726,755,904
5. Step 5: Solve for x
   x = 1,867,726,755,904/644,909
6. Step 6: Final answer
   x = 2,896,109.00