Finding the Third Proportional to 3,485,687 and 5,280,695

Step by Step Solution

1. Step 1: Write the proportion equation
   3,485,687 : 5,280,695 = 5,280,695 : x
2. Step 2: Convert to fraction form
   3,485,687/5,280,695 = 5,280,695/x
3. Step 3: Cross multiply
   3,485,687x = 5,280,695 × 5,280,695
4. Step 4: Simplify right side
   3,485,687x = 27,885,739,683,025
5. Step 5: Solve for x
   x = 27,885,739,683,025/3,485,687
6. Step 6: Final answer
   x = 8,000,069.91