Finding the Fourth Proportional to 2,018.52, 2,785.70 and 1,222.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.52 : 2,785.70 = 1,222.04 : x
2. Step 2: Convert to fraction form
   2,018.52/2,785.70 = 1,222.04/x
3. Step 3: Cross multiply
   2,018.52x = 2,785.70 × 1,222.04
4. Step 4: Simplify right side
   2,018.52x = 3,404,236.83
5. Step 5: Solve for x
   x = 3,404,236.83/2,018.52
6. Step 6: Final answer
   x = 1,686.50