Finding the Third Proportional to 664,728 and 1,442,208

Step by Step Solution

1. Step 1: Write the proportion equation
   664,728 : 1,442,208 = 1,442,208 : x
2. Step 2: Convert to fraction form
   664,728/1,442,208 = 1,442,208/x
3. Step 3: Cross multiply
   664,728x = 1,442,208 × 1,442,208
4. Step 4: Simplify right side
   664,728x = 2,079,963,915,264
5. Step 5: Solve for x
   x = 2,079,963,915,264/664,728
6. Step 6: Final answer
   x = 3,129,045.14