Finding the Third Proportional to 636,822 and 1,384,128

Step by Step Solution

1. Step 1: Write the proportion equation
   636,822 : 1,384,128 = 1,384,128 : x
2. Step 2: Convert to fraction form
   636,822/1,384,128 = 1,384,128/x
3. Step 3: Cross multiply
   636,822x = 1,384,128 × 1,384,128
4. Step 4: Simplify right side
   636,822x = 1,915,810,320,384
5. Step 5: Solve for x
   x = 1,915,810,320,384/636,822
6. Step 6: Final answer
   x = 3,008,392.17