Finding the Third Proportional to 368,694,586 and 789,978,418

Step by Step Solution

1. Step 1: Write the proportion equation
   368,694,586 : 789,978,418 = 789,978,418 : x
2. Step 2: Convert to fraction form
   368,694,586/789,978,418 = 789,978,418/x
3. Step 3: Cross multiply
   368,694,586x = 789,978,418 × 789,978,418
4. Step 4: Simplify right side
   368,694,586x = 624,065,900,905,782,784
5. Step 5: Solve for x
   x = 624,065,900,905,782,784/368,694,586
6. Step 6: Final answer
   x = 1,692,636,465.53