Finding the Fourth Proportional to 5,238.56, 7,229.25 and 2,880.79

Step by Step Solution

1. Step 1: Write the proportion equation
   5,238.56 : 7,229.25 = 2,880.79 : x
2. Step 2: Convert to fraction form
   5,238.56/7,229.25 = 2,880.79/x
3. Step 3: Cross multiply
   5,238.56x = 7,229.25 × 2,880.79
4. Step 4: Simplify right side
   5,238.56x = 20,825,933.03
5. Step 5: Solve for x
   x = 20,825,933.03/5,238.56
6. Step 6: Final answer
   x = 3,975.51