Finding the Fourth Proportional to 2,288.20, 3,434.72 and 2,171.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.20 : 3,434.72 = 2,171.56 : x
2. Step 2: Convert to fraction form
   2,288.20/3,434.72 = 2,171.56/x
3. Step 3: Cross multiply
   2,288.20x = 3,434.72 × 2,171.56
4. Step 4: Simplify right side
   2,288.20x = 7,458,700.56
5. Step 5: Solve for x
   x = 7,458,700.56/2,288.20
6. Step 6: Final answer
   x = 3,259.64