Finding the Fourth Proportional to 2,018.28, 2,786.04 and 1,355.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.28 : 2,786.04 = 1,355.52 : x
2. Step 2: Convert to fraction form
   2,018.28/2,786.04 = 1,355.52/x
3. Step 3: Cross multiply
   2,018.28x = 2,786.04 × 1,355.52
4. Step 4: Simplify right side
   2,018.28x = 3,776,532.94
5. Step 5: Solve for x
   x = 3,776,532.94/2,018.28
6. Step 6: Final answer
   x = 1,871.16