Finding the Third Proportional to 664,686 and 1,449,672

Step by Step Solution

1. Step 1: Write the proportion equation
   664,686 : 1,449,672 = 1,449,672 : x
2. Step 2: Convert to fraction form
   664,686/1,449,672 = 1,449,672/x
3. Step 3: Cross multiply
   664,686x = 1,449,672 × 1,449,672
4. Step 4: Simplify right side
   664,686x = 2,101,548,907,584
5. Step 5: Solve for x
   x = 2,101,548,907,584/664,686
6. Step 6: Final answer
   x = 3,161,716.82