Finding the Third Proportional to 3,657,820 and 8,039,669

Step by Step Solution

1. Step 1: Write the proportion equation
   3,657,820 : 8,039,669 = 8,039,669 : x
2. Step 2: Convert to fraction form
   3,657,820/8,039,669 = 8,039,669/x
3. Step 3: Cross multiply
   3,657,820x = 8,039,669 × 8,039,669
4. Step 4: Simplify right side
   3,657,820x = 64,636,277,629,561
5. Step 5: Solve for x
   x = 64,636,277,629,561/3,657,820
6. Step 6: Final answer
   x = 17,670,710.32