Finding the Fourth Proportional to 4,142.43, 5,708.86 and 3,078.51

Step by Step Solution

1. Step 1: Write the proportion equation
   4,142.43 : 5,708.86 = 3,078.51 : x
2. Step 2: Convert to fraction form
   4,142.43/5,708.86 = 3,078.51/x
3. Step 3: Cross multiply
   4,142.43x = 5,708.86 × 3,078.51
4. Step 4: Simplify right side
   4,142.43x = 17,574,782.60
5. Step 5: Solve for x
   x = 17,574,782.60/4,142.43
6. Step 6: Final answer
   x = 4,242.63