Finding the Third Proportional to 644,146 and 1,399,282

Step by Step Solution

1. Step 1: Write the proportion equation
   644,146 : 1,399,282 = 1,399,282 : x
2. Step 2: Convert to fraction form
   644,146/1,399,282 = 1,399,282/x
3. Step 3: Cross multiply
   644,146x = 1,399,282 × 1,399,282
4. Step 4: Simplify right side
   644,146x = 1,957,990,115,524
5. Step 5: Solve for x
   x = 1,957,990,115,524/644,146
6. Step 6: Final answer
   x = 3,039,668.20