Finding the Third Proportional to 356,831 and 521,850

Step by Step Solution

1. Step 1: Write the proportion equation
   356,831 : 521,850 = 521,850 : x
2. Step 2: Convert to fraction form
   356,831/521,850 = 521,850/x
3. Step 3: Cross multiply
   356,831x = 521,850 × 521,850
4. Step 4: Simplify right side
   356,831x = 272,327,422,500
5. Step 5: Solve for x
   x = 272,327,422,500/356,831
6. Step 6: Final answer
   x = 763,183.19