Finding the Third Proportional to 3,978,055 and 8,589,977

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978,055 : 8,589,977 = 8,589,977 : x
2. Step 2: Convert to fraction form
   3,978,055/8,589,977 = 8,589,977/x
3. Step 3: Cross multiply
   3,978,055x = 8,589,977 × 8,589,977
4. Step 4: Simplify right side
   3,978,055x = 73,787,704,860,529
5. Step 5: Solve for x
   x = 73,787,704,860,529/3,978,055
6. Step 6: Final answer
   x = 18,548,688.96