Finding the Third Proportional to 3,747,811 and 8,137,777

Step by Step Solution

1. Step 1: Write the proportion equation
   3,747,811 : 8,137,777 = 8,137,777 : x
2. Step 2: Convert to fraction form
   3,747,811/8,137,777 = 8,137,777/x
3. Step 3: Cross multiply
   3,747,811x = 8,137,777 × 8,137,777
4. Step 4: Simplify right side
   3,747,811x = 66,223,414,501,729
5. Step 5: Solve for x
   x = 66,223,414,501,729/3,747,811
6. Step 6: Final answer
   x = 17,669,891.71