Finding the Third Proportional to 258,249.50 and 557,995

Step by Step Solution

1. Step 1: Write the proportion equation
   258,249.50 : 557,995 = 557,995 : x
2. Step 2: Convert to fraction form
   258,249.50/557,995 = 557,995/x
3. Step 3: Cross multiply
   258,249.50x = 557,995 × 557,995
4. Step 4: Simplify right side
   258,249.50x = 311,358,420,025
5. Step 5: Solve for x
   x = 311,358,420,025/258,249.50
6. Step 6: Final answer
   x = 1,205,649.65