Finding the Fourth Proportional to 3,891.72, 5,367.54 and 2,494.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,891.72 : 5,367.54 = 2,494.60 : x
2. Step 2: Convert to fraction form
   3,891.72/5,367.54 = 2,494.60/x
3. Step 3: Cross multiply
   3,891.72x = 5,367.54 × 2,494.60
4. Step 4: Simplify right side
   3,891.72x = 13,389,865.28
5. Step 5: Solve for x
   x = 13,389,865.28/3,891.72
6. Step 6: Final answer
   x = 3,440.60