Finding the Fourth Proportional to 2,686.02, 4,028.76 and 1,042.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,686.02 : 4,028.76 = 1,042.56 : x
2. Step 2: Convert to fraction form
   2,686.02/4,028.76 = 1,042.56/x
3. Step 3: Cross multiply
   2,686.02x = 4,028.76 × 1,042.56
4. Step 4: Simplify right side
   2,686.02x = 4,200,224.03
5. Step 5: Solve for x
   x = 4,200,224.03/2,686.02
6. Step 6: Final answer
   x = 1,563.74