Finding the Fourth Proportional to 2,017.40, 2,783.84 and 1,231.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.40 : 2,783.84 = 1,231.29 : x
2. Step 2: Convert to fraction form
   2,017.40/2,783.84 = 1,231.29/x
3. Step 3: Cross multiply
   2,017.40x = 2,783.84 × 1,231.29
4. Step 4: Simplify right side
   2,017.40x = 3,427,708.20
5. Step 5: Solve for x
   x = 3,427,708.20/2,017.40
6. Step 6: Final answer
   x = 1,699.08