Finding the Third Proportional to 356,590 and 783,163.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,590 : 783,163.50 = 783,163.50 : x
2. Step 2: Convert to fraction form
   356,590/783,163.50 = 783,163.50/x
3. Step 3: Cross multiply
   356,590x = 783,163.50 × 783,163.50
4. Step 4: Simplify right side
   356,590x = 613,345,067,732.25
5. Step 5: Solve for x
   x = 613,345,067,732.25/356,590
6. Step 6: Final answer
   x = 1,720,028.79