Finding the Fourth Proportional to 3,840.57, 5,757.98 and 3,320.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,840.57 : 5,757.98 = 3,320.37 : x
2. Step 2: Convert to fraction form
   3,840.57/5,757.98 = 3,320.37/x
3. Step 3: Cross multiply
   3,840.57x = 5,757.98 × 3,320.37
4. Step 4: Simplify right side
   3,840.57x = 19,118,607.45
5. Step 5: Solve for x
   x = 19,118,607.45/3,840.57
6. Step 6: Final answer
   x = 4,978.07