Finding the Fourth Proportional to 2,018.81, 2,785.25 and 1,272.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.81 : 2,785.25 = 1,272.51 : x
2. Step 2: Convert to fraction form
   2,018.81/2,785.25 = 1,272.51/x
3. Step 3: Cross multiply
   2,018.81x = 2,785.25 × 1,272.51
4. Step 4: Simplify right side
   2,018.81x = 3,544,261.66
5. Step 5: Solve for x
   x = 3,544,261.66/2,018.81
6. Step 6: Final answer
   x = 1,755.62