Finding the Fourth Proportional to 8,019.56, 12,021.35 and 3,858.39

Step by Step Solution

1. Step 1: Write the proportion equation
   8,019.56 : 12,021.35 = 3,858.39 : x
2. Step 2: Convert to fraction form
   8,019.56/12,021.35 = 3,858.39/x
3. Step 3: Cross multiply
   8,019.56x = 12,021.35 × 3,858.39
4. Step 4: Simplify right side
   8,019.56x = 46,383,037.33
5. Step 5: Solve for x
   x = 46,383,037.33/8,019.56
6. Step 6: Final answer
   x = 5,783.74