Finding the Third Proportional to 640,366 and 1,380,044

Step by Step Solution

1. Step 1: Write the proportion equation
   640,366 : 1,380,044 = 1,380,044 : x
2. Step 2: Convert to fraction form
   640,366/1,380,044 = 1,380,044/x
3. Step 3: Cross multiply
   640,366x = 1,380,044 × 1,380,044
4. Step 4: Simplify right side
   640,366x = 1,904,521,441,936
5. Step 5: Solve for x
   x = 1,904,521,441,936/640,366
6. Step 6: Final answer
   x = 2,974,113.93