Finding the Third Proportional to 3,867,772 and 8,378,360

Step by Step Solution

1. Step 1: Write the proportion equation
   3,867,772 : 8,378,360 = 8,378,360 : x
2. Step 2: Convert to fraction form
   3,867,772/8,378,360 = 8,378,360/x
3. Step 3: Cross multiply
   3,867,772x = 8,378,360 × 8,378,360
4. Step 4: Simplify right side
   3,867,772x = 70,196,916,289,600
5. Step 5: Solve for x
   x = 70,196,916,289,600/3,867,772
6. Step 6: Final answer
   x = 18,149,186.74