Finding the Fourth Proportional to 2,686.10, 4,028.72 and 1,043.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,686.10 : 4,028.72 = 1,043.42 : x
2. Step 2: Convert to fraction form
   2,686.10/4,028.72 = 1,043.42/x
3. Step 3: Cross multiply
   2,686.10x = 4,028.72 × 1,043.42
4. Step 4: Simplify right side
   2,686.10x = 4,203,647.02
5. Step 5: Solve for x
   x = 4,203,647.02/2,686.10
6. Step 6: Final answer
   x = 1,564.96