Finding the Third Proportional to 664,660 and 1,449,620

Step by Step Solution

1. Step 1: Write the proportion equation
   664,660 : 1,449,620 = 1,449,620 : x
2. Step 2: Convert to fraction form
   664,660/1,449,620 = 1,449,620/x
3. Step 3: Cross multiply
   664,660x = 1,449,620 × 1,449,620
4. Step 4: Simplify right side
   664,660x = 2,101,398,144,400
5. Step 5: Solve for x
   x = 2,101,398,144,400/664,660
6. Step 6: Final answer
   x = 3,161,613.67