Finding the Fourth Proportional to 5,721.78, 7,896.41 and 3,204.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,721.78 : 7,896.41 = 3,204.05 : x
2. Step 2: Convert to fraction form
   5,721.78/7,896.41 = 3,204.05/x
3. Step 3: Cross multiply
   5,721.78x = 7,896.41 × 3,204.05
4. Step 4: Simplify right side
   5,721.78x = 25,300,492.46
5. Step 5: Solve for x
   x = 25,300,492.46/5,721.78
6. Step 6: Final answer
   x = 4,421.79