Finding the Fourth Proportional to 3,967.21, 5,952.89 and 2,880.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,967.21 : 5,952.89 = 2,880.55 : x
2. Step 2: Convert to fraction form
   3,967.21/5,952.89 = 2,880.55/x
3. Step 3: Cross multiply
   3,967.21x = 5,952.89 × 2,880.55
4. Step 4: Simplify right side
   3,967.21x = 17,147,597.29
5. Step 5: Solve for x
   x = 17,147,597.29/3,967.21
6. Step 6: Final answer
   x = 4,322.33