Finding the Fourth Proportional to 8,011.96, 12,019.32 and 3,571.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,011.96 : 12,019.32 = 3,571.20 : x
2. Step 2: Convert to fraction form
   8,011.96/12,019.32 = 3,571.20/x
3. Step 3: Cross multiply
   8,011.96x = 12,019.32 × 3,571.20
4. Step 4: Simplify right side
   8,011.96x = 42,923,395.58
5. Step 5: Solve for x
   x = 42,923,395.58/8,011.96
6. Step 6: Final answer
   x = 5,357.42