Finding the Fourth Proportional to 2,017.28, 2,783.49 and 1,231.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.28 : 2,783.49 = 1,231.58 : x
2. Step 2: Convert to fraction form
   2,017.28/2,783.49 = 1,231.58/x
3. Step 3: Cross multiply
   2,017.28x = 2,783.49 × 1,231.58
4. Step 4: Simplify right side
   2,017.28x = 3,428,090.61
5. Step 5: Solve for x
   x = 3,428,090.61/2,017.28
6. Step 6: Final answer
   x = 1,699.36