Finding the Fourth Proportional to 4,128.04, 5,688.42 and 3,078.28

Step by Step Solution

1. Step 1: Write the proportion equation
   4,128.04 : 5,688.42 = 3,078.28 : x
2. Step 2: Convert to fraction form
   4,128.04/5,688.42 = 3,078.28/x
3. Step 3: Cross multiply
   4,128.04x = 5,688.42 × 3,078.28
4. Step 4: Simplify right side
   4,128.04x = 17,510,549.52
5. Step 5: Solve for x
   x = 17,510,549.52/4,128.04
6. Step 6: Final answer
   x = 4,241.86