Finding the Third Proportional to 3,988,010 and 8,697,811

Step by Step Solution

1. Step 1: Write the proportion equation
   3,988,010 : 8,697,811 = 8,697,811 : x
2. Step 2: Convert to fraction form
   3,988,010/8,697,811 = 8,697,811/x
3. Step 3: Cross multiply
   3,988,010x = 8,697,811 × 8,697,811
4. Step 4: Simplify right side
   3,988,010x = 75,651,916,191,721
5. Step 5: Solve for x
   x = 75,651,916,191,721/3,988,010
6. Step 6: Final answer
   x = 18,969,841.15