Finding the Third Proportional to 368,694,585 and 789,978,416

Step by Step Solution

1. Step 1: Write the proportion equation
   368,694,585 : 789,978,416 = 789,978,416 : x
2. Step 2: Convert to fraction form
   368,694,585/789,978,416 = 789,978,416/x
3. Step 3: Cross multiply
   368,694,585x = 789,978,416 × 789,978,416
4. Step 4: Simplify right side
   368,694,585x = 624,065,897,745,869,056
5. Step 5: Solve for x
   x = 624,065,897,745,869,056/368,694,585
6. Step 6: Final answer
   x = 1,692,636,461.55