Finding the Third Proportional to 644,813,398 and 1,399,103,632

Step by Step Solution

1. Step 1: Write the proportion equation
   644,813,398 : 1,399,103,632 = 1,399,103,632 : x
2. Step 2: Convert to fraction form
   644,813,398/1,399,103,632 = 1,399,103,632/x
3. Step 3: Cross multiply
   644,813,398x = 1,399,103,632 × 1,399,103,632
4. Step 4: Simplify right side
   644,813,398x = 1,957,490,973,075,591,424
5. Step 5: Solve for x
   x = 1,957,490,973,075,591,424/644,813,398
6. Step 6: Final answer
   x = 3,035,747,984.06