Finding the Fourth Proportional to 8,002.56, 11,040.89 and 5,171.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,002.56 : 11,040.89 = 5,171.60 : x
2. Step 2: Convert to fraction form
   8,002.56/11,040.89 = 5,171.60/x
3. Step 3: Cross multiply
   8,002.56x = 11,040.89 × 5,171.60
4. Step 4: Simplify right side
   8,002.56x = 57,099,107.26
5. Step 5: Solve for x
   x = 57,099,107.26/8,002.56
6. Step 6: Final answer
   x = 7,135.11