Finding the Third Proportional to 3,485,681 and 5,280,686

Step by Step Solution

1. Step 1: Write the proportion equation
   3,485,681 : 5,280,686 = 5,280,686 : x
2. Step 2: Convert to fraction form
   3,485,681/5,280,686 = 5,280,686/x
3. Step 3: Cross multiply
   3,485,681x = 5,280,686 × 5,280,686
4. Step 4: Simplify right side
   3,485,681x = 27,885,644,630,596
5. Step 5: Solve for x
   x = 27,885,644,630,596/3,485,681
6. Step 6: Final answer
   x = 8,000,056.41