Finding the Fourth Proportional to 2,255.72, 3,368.59 and 2,231.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.72 : 3,368.59 = 2,231.28 : x
2. Step 2: Convert to fraction form
   2,255.72/3,368.59 = 2,231.28/x
3. Step 3: Cross multiply
   2,255.72x = 3,368.59 × 2,231.28
4. Step 4: Simplify right side
   2,255.72x = 7,516,261.92
5. Step 5: Solve for x
   x = 7,516,261.92/2,255.72
6. Step 6: Final answer
   x = 3,332.10