Finding the Fourth Proportional to 3,540.39, 5,280.71 and 3,074.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,540.39 : 5,280.71 = 3,074.50 : x
2. Step 2: Convert to fraction form
   3,540.39/5,280.71 = 3,074.50/x
3. Step 3: Cross multiply
   3,540.39x = 5,280.71 × 3,074.50
4. Step 4: Simplify right side
   3,540.39x = 16,235,551.42
5. Step 5: Solve for x
   x = 16,235,551.42/3,540.39
6. Step 6: Final answer
   x = 4,585.81