Finding the Third Proportional to 641,229,516 and 1,400,517,648

Step by Step Solution

1. Step 1: Write the proportion equation
   641,229,516 : 1,400,517,648 = 1,400,517,648 : x
2. Step 2: Convert to fraction form
   641,229,516/1,400,517,648 = 1,400,517,648/x
3. Step 3: Cross multiply
   641,229,516x = 1,400,517,648 × 1,400,517,648
4. Step 4: Simplify right side
   641,229,516x = 1,961,449,682,359,451,904
5. Step 5: Solve for x
   x = 1,961,449,682,359,451,904/641,229,516
6. Step 6: Final answer
   x = 3,058,888,640.37