Finding the Third Proportional to 3,485,689 and 5,280,698

Step by Step Solution

1. Step 1: Write the proportion equation
   3,485,689 : 5,280,698 = 5,280,698 : x
2. Step 2: Convert to fraction form
   3,485,689/5,280,698 = 5,280,698/x
3. Step 3: Cross multiply
   3,485,689x = 5,280,698 × 5,280,698
4. Step 4: Simplify right side
   3,485,689x = 27,885,771,367,204
5. Step 5: Solve for x
   x = 27,885,771,367,204/3,485,689
6. Step 6: Final answer
   x = 8,000,074.41