Finding the Fourth Proportional to 2,017.28, 2,783.86 and 1,121.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.28 : 2,783.86 = 1,121.04 : x
2. Step 2: Convert to fraction form
   2,017.28/2,783.86 = 1,121.04/x
3. Step 3: Cross multiply
   2,017.28x = 2,783.86 × 1,121.04
4. Step 4: Simplify right side
   2,017.28x = 3,120,815.61
5. Step 5: Solve for x
   x = 3,120,815.61/2,017.28
6. Step 6: Final answer
   x = 1,547.04