Finding the Fourth Proportional to 2,018.73, 3,028.23 and 557.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.73 : 3,028.23 = 557.76 : x
2. Step 2: Convert to fraction form
   2,018.73/3,028.23 = 557.76/x
3. Step 3: Cross multiply
   2,018.73x = 3,028.23 × 557.76
4. Step 4: Simplify right side
   2,018.73x = 1,689,025.56
5. Step 5: Solve for x
   x = 1,689,025.56/2,018.73
6. Step 6: Final answer
   x = 836.68