Finding the Third Proportional to 644,571 and 1,404,688

Step by Step Solution

1. Step 1: Write the proportion equation
   644,571 : 1,404,688 = 1,404,688 : x
2. Step 2: Convert to fraction form
   644,571/1,404,688 = 1,404,688/x
3. Step 3: Cross multiply
   644,571x = 1,404,688 × 1,404,688
4. Step 4: Simplify right side
   644,571x = 1,973,148,377,344
5. Step 5: Solve for x
   x = 1,973,148,377,344/644,571
6. Step 6: Final answer
   x = 3,061,180.81