Finding the Fourth Proportional to 2,018.15, 2,785.16 and 1,178.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.15 : 2,785.16 = 1,178.74 : x
2. Step 2: Convert to fraction form
   2,018.15/2,785.16 = 1,178.74/x
3. Step 3: Cross multiply
   2,018.15x = 2,785.16 × 1,178.74
4. Step 4: Simplify right side
   2,018.15x = 3,282,978.69
5. Step 5: Solve for x
   x = 3,282,978.69/2,018.15
6. Step 6: Final answer
   x = 1,626.72