Finding the Fourth Proportional to 3,728.54, 5,144.06 and 2,215.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,728.54 : 5,144.06 = 2,215.72 : x
2. Step 2: Convert to fraction form
   3,728.54/5,144.06 = 2,215.72/x
3. Step 3: Cross multiply
   3,728.54x = 5,144.06 × 2,215.72
4. Step 4: Simplify right side
   3,728.54x = 11,397,796.62
5. Step 5: Solve for x
   x = 11,397,796.62/3,728.54
6. Step 6: Final answer
   x = 3,056.91