Finding the Fourth Proportional to 2,017.79, 2,784.55 and 1,121.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.79 : 2,784.55 = 1,121.54 : x
2. Step 2: Convert to fraction form
   2,017.79/2,784.55 = 1,121.54/x
3. Step 3: Cross multiply
   2,017.79x = 2,784.55 × 1,121.54
4. Step 4: Simplify right side
   2,017.79x = 3,122,984.21
5. Step 5: Solve for x
   x = 3,122,984.21/2,017.79
6. Step 6: Final answer
   x = 1,547.73