Finding the Fourth Proportional to 5,710.72, 7,880.16 and 3,226.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,710.72 : 7,880.16 = 3,226.72 : x
2. Step 2: Convert to fraction form
   5,710.72/7,880.16 = 3,226.72/x
3. Step 3: Cross multiply
   5,710.72x = 7,880.16 × 3,226.72
4. Step 4: Simplify right side
   5,710.72x = 25,427,069.88
5. Step 5: Solve for x
   x = 25,427,069.88/5,710.72
6. Step 6: Final answer
   x = 4,452.52