Finding the Third Proportional to 2,021,684 and 4,397,664

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021,684 : 4,397,664 = 4,397,664 : x
2. Step 2: Convert to fraction form
   2,021,684/4,397,664 = 4,397,664/x
3. Step 3: Cross multiply
   2,021,684x = 4,397,664 × 4,397,664
4. Step 4: Simplify right side
   2,021,684x = 19,339,448,656,896
5. Step 5: Solve for x
   x = 19,339,448,656,896/2,021,684
6. Step 6: Final answer
   x = 9,566,009.65