Finding the Third Proportional to 3,857,450 and 8,400,664

Step by Step Solution

1. Step 1: Write the proportion equation
   3,857,450 : 8,400,664 = 8,400,664 : x
2. Step 2: Convert to fraction form
   3,857,450/8,400,664 = 8,400,664/x
3. Step 3: Cross multiply
   3,857,450x = 8,400,664 × 8,400,664
4. Step 4: Simplify right side
   3,857,450x = 70,571,155,640,896
5. Step 5: Solve for x
   x = 70,571,155,640,896/3,857,450
6. Step 6: Final answer
   x = 18,294,768.73