Finding the Third Proportional to 644,572 and 1,382,404

Step by Step Solution

1. Step 1: Write the proportion equation
   644,572 : 1,382,404 = 1,382,404 : x
2. Step 2: Convert to fraction form
   644,572/1,382,404 = 1,382,404/x
3. Step 3: Cross multiply
   644,572x = 1,382,404 × 1,382,404
4. Step 4: Simplify right side
   644,572x = 1,911,040,819,216
5. Step 5: Solve for x
   x = 1,911,040,819,216/644,572
6. Step 6: Final answer
   x = 2,964,821.34