Finding the Fourth Proportional to 8,171.28, 12,259.89 and 5,015.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,171.28 : 12,259.89 = 5,015.16 : x
2. Step 2: Convert to fraction form
   8,171.28/12,259.89 = 5,015.16/x
3. Step 3: Cross multiply
   8,171.28x = 12,259.89 × 5,015.16
4. Step 4: Simplify right side
   8,171.28x = 61,485,309.93
5. Step 5: Solve for x
   x = 61,485,309.93/8,171.28
6. Step 6: Final answer
   x = 7,524.56