Finding the Third Proportional to 664,688 and 1,449,676

Step by Step Solution

1. Step 1: Write the proportion equation
   664,688 : 1,449,676 = 1,449,676 : x
2. Step 2: Convert to fraction form
   664,688/1,449,676 = 1,449,676/x
3. Step 3: Cross multiply
   664,688x = 1,449,676 × 1,449,676
4. Step 4: Simplify right side
   664,688x = 2,101,560,504,976
5. Step 5: Solve for x
   x = 2,101,560,504,976/664,688
6. Step 6: Final answer
   x = 3,161,724.76