Finding the Third Proportional to 644,566 and 1,382,396

Step by Step Solution

1. Step 1: Write the proportion equation
   644,566 : 1,382,396 = 1,382,396 : x
2. Step 2: Convert to fraction form
   644,566/1,382,396 = 1,382,396/x
3. Step 3: Cross multiply
   644,566x = 1,382,396 × 1,382,396
4. Step 4: Simplify right side
   644,566x = 1,911,018,700,816
5. Step 5: Solve for x
   x = 1,911,018,700,816/644,566
6. Step 6: Final answer
   x = 2,964,814.62