Finding the Third Proportional to 144,067,372 and 315,454,747

Step by Step Solution

1. Step 1: Write the proportion equation
   144,067,372 : 315,454,747 = 315,454,747 : x
2. Step 2: Convert to fraction form
   144,067,372/315,454,747 = 315,454,747/x
3. Step 3: Cross multiply
   144,067,372x = 315,454,747 × 315,454,747
4. Step 4: Simplify right side
   144,067,372x = 99,511,697,404,834,016
5. Step 5: Solve for x
   x = 99,511,697,404,834,016/144,067,372
6. Step 6: Final answer
   x = 690,730,288.36