Finding the Fourth Proportional to 2,017.36, 2,783.46 and 1,231.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.36 : 2,783.46 = 1,231.12 : x
2. Step 2: Convert to fraction form
   2,017.36/2,783.46 = 1,231.12/x
3. Step 3: Cross multiply
   2,017.36x = 2,783.46 × 1,231.12
4. Step 4: Simplify right side
   2,017.36x = 3,426,773.28
5. Step 5: Solve for x
   x = 3,426,773.28/2,017.36
6. Step 6: Final answer
   x = 1,698.64