Finding the Third Proportional to 3,657,819 and 8,039,667

Step by Step Solution

1. Step 1: Write the proportion equation
   3,657,819 : 8,039,667 = 8,039,667 : x
2. Step 2: Convert to fraction form
   3,657,819/8,039,667 = 8,039,667/x
3. Step 3: Cross multiply
   3,657,819x = 8,039,667 × 8,039,667
4. Step 4: Simplify right side
   3,657,819x = 64,636,245,470,889
5. Step 5: Solve for x
   x = 64,636,245,470,889/3,657,819
6. Step 6: Final answer
   x = 17,670,706.36