Finding the Fourth Proportional to 3,879.09, 5,819.22 and 1,281.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,879.09 : 5,819.22 = 1,281.42 : x
2. Step 2: Convert to fraction form
   3,879.09/5,819.22 = 1,281.42/x
3. Step 3: Cross multiply
   3,879.09x = 5,819.22 × 1,281.42
4. Step 4: Simplify right side
   3,879.09x = 7,456,864.89
5. Step 5: Solve for x
   x = 7,456,864.89/3,879.09
6. Step 6: Final answer
   x = 1,922.32