Finding the Fourth Proportional to 7,171.49, 10,757.90 and 2,789.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,171.49 : 10,757.90 = 2,789.28 : x
2. Step 2: Convert to fraction form
   7,171.49/10,757.90 = 2,789.28/x
3. Step 3: Cross multiply
   7,171.49x = 10,757.90 × 2,789.28
4. Step 4: Simplify right side
   7,171.49x = 30,006,795.31
5. Step 5: Solve for x
   x = 30,006,795.31/7,171.49
6. Step 6: Final answer
   x = 4,184.18