Finding the Fourth Proportional to 2,018.36, 2,785.42 and 1,272.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.36 : 2,785.42 = 1,272.22 : x
2. Step 2: Convert to fraction form
   2,018.36/2,785.42 = 1,272.22/x
3. Step 3: Cross multiply
   2,018.36x = 2,785.42 × 1,272.22
4. Step 4: Simplify right side
   2,018.36x = 3,543,667.03
5. Step 5: Solve for x
   x = 3,543,667.03/2,018.36
6. Step 6: Final answer
   x = 1,755.72