Finding the Fourth Proportional to 10,040.05, 13,854.89 and 5,791.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,040.05 : 13,854.89 = 5,791.28 : x
2. Step 2: Convert to fraction form
   10,040.05/13,854.89 = 5,791.28/x
3. Step 3: Cross multiply
   10,040.05x = 13,854.89 × 5,791.28
4. Step 4: Simplify right side
   10,040.05x = 80,237,518.40
5. Step 5: Solve for x
   x = 80,237,518.40/10,040.05
6. Step 6: Final answer
   x = 7,991.75