Finding the Fourth Proportional to 2,615.54, 3,921.41 and 1,228.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.54 : 3,921.41 = 1,228.16 : x
2. Step 2: Convert to fraction form
   2,615.54/3,921.41 = 1,228.16/x
3. Step 3: Cross multiply
   2,615.54x = 3,921.41 × 1,228.16
4. Step 4: Simplify right side
   2,615.54x = 4,816,131.78
5. Step 5: Solve for x
   x = 4,816,131.78/2,615.54
6. Step 6: Final answer
   x = 1,841.35