Finding the Fourth Proportional to 3,728.72, 5,145.37 and 2,235.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,728.72 : 5,145.37 = 2,235.89 : x
2. Step 2: Convert to fraction form
   3,728.72/5,145.37 = 2,235.89/x
3. Step 3: Cross multiply
   3,728.72x = 5,145.37 × 2,235.89
4. Step 4: Simplify right side
   3,728.72x = 11,504,481.33
5. Step 5: Solve for x
   x = 11,504,481.33/3,728.72
6. Step 6: Final answer
   x = 3,085.37