Finding the Fourth Proportional to 3,967.38, 5,474.43 and 2,288.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,967.38 : 5,474.43 = 2,288.55 : x
2. Step 2: Convert to fraction form
   3,967.38/5,474.43 = 2,288.55/x
3. Step 3: Cross multiply
   3,967.38x = 5,474.43 × 2,288.55
4. Step 4: Simplify right side
   3,967.38x = 12,528,506.78
5. Step 5: Solve for x
   x = 12,528,506.78/3,967.38
6. Step 6: Final answer
   x = 3,157.88