Finding the Fourth Proportional to 2,879.69, 4,315.92 and 1,234.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,879.69 : 4,315.92 = 1,234.31 : x
2. Step 2: Convert to fraction form
   2,879.69/4,315.92 = 1,234.31/x
3. Step 3: Cross multiply
   2,879.69x = 4,315.92 × 1,234.31
4. Step 4: Simplify right side
   2,879.69x = 5,327,161.64
5. Step 5: Solve for x
   x = 5,327,161.64/2,879.69
6. Step 6: Final answer
   x = 1,849.91