Finding the Fourth Proportional to 2,018.88, 3,028.37 and 558.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.88 : 3,028.37 = 558.09 : x
2. Step 2: Convert to fraction form
   2,018.88/3,028.37 = 558.09/x
3. Step 3: Cross multiply
   2,018.88x = 3,028.37 × 558.09
4. Step 4: Simplify right side
   2,018.88x = 1,690,100.22
5. Step 5: Solve for x
   x = 1,690,100.22/2,018.88
6. Step 6: Final answer
   x = 837.15