Finding the Third Proportional to 7,867,138 and 12,150,087

Step by Step Solution

1. Step 1: Write the proportion equation
   7,867,138 : 12,150,087 = 12,150,087 : x
2. Step 2: Convert to fraction form
   7,867,138/12,150,087 = 12,150,087/x
3. Step 3: Cross multiply
   7,867,138x = 12,150,087 × 12,150,087
4. Step 4: Simplify right side
   7,867,138x = 147,624,614,107,569
5. Step 5: Solve for x
   x = 147,624,614,107,569/7,867,138
6. Step 6: Final answer
   x = 18,764,716.48