Finding the Third Proportional to 368,694,580.50 and 789,978,408

Step by Step Solution

1. Step 1: Write the proportion equation
   368,694,580.50 : 789,978,408 = 789,978,408 : x
2. Step 2: Convert to fraction form
   368,694,580.50/789,978,408 = 789,978,408/x
3. Step 3: Cross multiply
   368,694,580.50x = 789,978,408 × 789,978,408
4. Step 4: Simplify right side
   368,694,580.50x = 624,065,885,106,214,400
5. Step 5: Solve for x
   x = 624,065,885,106,214,400/368,694,580.50
6. Step 6: Final answer
   x = 1,692,636,447.92