Finding the Fourth Proportional to 2,018.76, 2,785.75 and 1,222.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.76 : 2,785.75 = 1,222.26 : x
2. Step 2: Convert to fraction form
   2,018.76/2,785.75 = 1,222.26/x
3. Step 3: Cross multiply
   2,018.76x = 2,785.75 × 1,222.26
4. Step 4: Simplify right side
   2,018.76x = 3,404,910.80
5. Step 5: Solve for x
   x = 3,404,910.80/2,018.76
6. Step 6: Final answer
   x = 1,686.63