Finding the Third Proportional to 7,867,131 and 12,150,078

Step by Step Solution

1. Step 1: Write the proportion equation
   7,867,131 : 12,150,078 = 12,150,078 : x
2. Step 2: Convert to fraction form
   7,867,131/12,150,078 = 12,150,078/x
3. Step 3: Cross multiply
   7,867,131x = 12,150,078 × 12,150,078
4. Step 4: Simplify right side
   7,867,131x = 147,624,395,406,084
5. Step 5: Solve for x
   x = 147,624,395,406,084/7,867,131
6. Step 6: Final answer
   x = 18,764,705.38