Finding the Fourth Proportional to 3,986.37, 5,978.33 and 3,204.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.37 : 5,978.33 = 3,204.51 : x
2. Step 2: Convert to fraction form
   3,986.37/5,978.33 = 3,204.51/x
3. Step 3: Cross multiply
   3,986.37x = 5,978.33 × 3,204.51
4. Step 4: Simplify right side
   3,986.37x = 19,157,618.27
5. Step 5: Solve for x
   x = 19,157,618.27/3,986.37
6. Step 6: Final answer
   x = 4,805.78