Finding the Fourth Proportional to 2,018.65, 2,785.72 and 1,122.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.65 : 2,785.72 = 1,122.43 : x
2. Step 2: Convert to fraction form
   2,018.65/2,785.72 = 1,122.43/x
3. Step 3: Cross multiply
   2,018.65x = 2,785.72 × 1,122.43
4. Step 4: Simplify right side
   2,018.65x = 3,126,775.70
5. Step 5: Solve for x
   x = 3,126,775.70/2,018.65
6. Step 6: Final answer
   x = 1,548.94