Finding the Fourth Proportional to 5,231.39, 7,841.21 and 2,760.89

Step by Step Solution

1. Step 1: Write the proportion equation
   5,231.39 : 7,841.21 = 2,760.89 : x
2. Step 2: Convert to fraction form
   5,231.39/7,841.21 = 2,760.89/x
3. Step 3: Cross multiply
   5,231.39x = 7,841.21 × 2,760.89
4. Step 4: Simplify right side
   5,231.39x = 21,648,665.27
5. Step 5: Solve for x
   x = 21,648,665.27/5,231.39
6. Step 6: Final answer
   x = 4,138.23