Finding the Fourth Proportional to 2,018.60, 2,785.72 and 1,134.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.60 : 2,785.72 = 1,134.38 : x
2. Step 2: Convert to fraction form
   2,018.60/2,785.72 = 1,134.38/x
3. Step 3: Cross multiply
   2,018.60x = 2,785.72 × 1,134.38
4. Step 4: Simplify right side
   2,018.60x = 3,160,065.05
5. Step 5: Solve for x
   x = 3,160,065.05/2,018.60
6. Step 6: Final answer
   x = 1,565.47