Finding the Third Proportional to 3,998,535 and 8,634,204

Step by Step Solution

1. Step 1: Write the proportion equation
   3,998,535 : 8,634,204 = 8,634,204 : x
2. Step 2: Convert to fraction form
   3,998,535/8,634,204 = 8,634,204/x
3. Step 3: Cross multiply
   3,998,535x = 8,634,204 × 8,634,204
4. Step 4: Simplify right side
   3,998,535x = 74,549,478,713,616
5. Step 5: Solve for x
   x = 74,549,478,713,616/3,998,535
6. Step 6: Final answer
   x = 18,644,198.12