Finding the Third Proportional to 644,582 and 1,403,860

Step by Step Solution

1. Step 1: Write the proportion equation
   644,582 : 1,403,860 = 1,403,860 : x
2. Step 2: Convert to fraction form
   644,582/1,403,860 = 1,403,860/x
3. Step 3: Cross multiply
   644,582x = 1,403,860 × 1,403,860
4. Step 4: Simplify right side
   644,582x = 1,970,822,899,600
5. Step 5: Solve for x
   x = 1,970,822,899,600/644,582
6. Step 6: Final answer
   x = 3,057,520.84