Finding the Third Proportional to 3,660,198 and 5,280,321

Step by Step Solution

1. Step 1: Write the proportion equation
   3,660,198 : 5,280,321 = 5,280,321 : x
2. Step 2: Convert to fraction form
   3,660,198/5,280,321 = 5,280,321/x
3. Step 3: Cross multiply
   3,660,198x = 5,280,321 × 5,280,321
4. Step 4: Simplify right side
   3,660,198x = 27,881,789,863,041
5. Step 5: Solve for x
   x = 27,881,789,863,041/3,660,198
6. Step 6: Final answer
   x = 7,617,563.27