Finding the Fourth Proportional to 3,867.84, 5,771.52 and 3,401.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,867.84 : 5,771.52 = 3,401.28 : x
2. Step 2: Convert to fraction form
   3,867.84/5,771.52 = 3,401.28/x
3. Step 3: Cross multiply
   3,867.84x = 5,771.52 × 3,401.28
4. Step 4: Simplify right side
   3,867.84x = 19,630,555.55
5. Step 5: Solve for x
   x = 19,630,555.55/3,867.84
6. Step 6: Final answer
   x = 5,075.33