Finding the Third Proportional to 3,485,690 and 5,280,700

Step by Step Solution

1. Step 1: Write the proportion equation
   3,485,690 : 5,280,700 = 5,280,700 : x
2. Step 2: Convert to fraction form
   3,485,690/5,280,700 = 5,280,700/x
3. Step 3: Cross multiply
   3,485,690x = 5,280,700 × 5,280,700
4. Step 4: Simplify right side
   3,485,690x = 27,885,792,490,000
5. Step 5: Solve for x
   x = 27,885,792,490,000/3,485,690
6. Step 6: Final answer
   x = 8,000,078.17