Finding the Fourth Proportional to 2,288.72, 3,433.52 and 728.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.72 : 3,433.52 = 728.87 : x
2. Step 2: Convert to fraction form
   2,288.72/3,433.52 = 728.87/x
3. Step 3: Cross multiply
   2,288.72x = 3,433.52 × 728.87
4. Step 4: Simplify right side
   2,288.72x = 2,502,574.38
5. Step 5: Solve for x
   x = 2,502,574.38/2,288.72
6. Step 6: Final answer
   x = 1,093.44