Finding the Third Proportional to 1,621,669,354 and 3,540,591,386

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621,669,354 : 3,540,591,386 = 3,540,591,386 : x
2. Step 2: Convert to fraction form
   1,621,669,354/3,540,591,386 = 3,540,591,386/x
3. Step 3: Cross multiply
   1,621,669,354x = 3,540,591,386 × 3,540,591,386
4. Step 4: Simplify right side
   1,621,669,354x = 12,535,787,362,617,401,344
5. Step 5: Solve for x
   x = 12,535,787,362,617,401,344/1,621,669,354
6. Step 6: Final answer
   x = 7,730,174,669.51