Finding the Fourth Proportional to 2,016.99, 2,783.57 and 1,231.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.99 : 2,783.57 = 1,231.29 : x
2. Step 2: Convert to fraction form
   2,016.99/2,783.57 = 1,231.29/x
3. Step 3: Cross multiply
   2,016.99x = 2,783.57 × 1,231.29
4. Step 4: Simplify right side
   2,016.99x = 3,427,375.75
5. Step 5: Solve for x
   x = 3,427,375.75/2,016.99
6. Step 6: Final answer
   x = 1,699.25