Finding the Third Proportional to 3,977,874,217.69 and 8,661,983,706

Step by Step Solution

1. Step 1: Write the proportion equation
   3,977,874,217.69 : 8,661,983,706 = 8,661,983,706 : x
2. Step 2: Convert to fraction form
   3,977,874,217.69/8,661,983,706 = 8,661,983,706/x
3. Step 3: Cross multiply
   3,977,874,217.69x = 8,661,983,706 × 8,661,983,706
4. Step 4: Simplify right side
   3,977,874,217.69x = 75,029,961,723,009,499,136
5. Step 5: Solve for x
   x = 75,029,961,723,009,499,136/3,977,874,217.69
6. Step 6: Final answer
   x = 18,861,823,581.40