Finding the Fourth Proportional to 2,017.68, 2,784.69 and 1,231.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.68 : 2,784.69 = 1,231.56 : x
2. Step 2: Convert to fraction form
   2,017.68/2,784.69 = 1,231.56/x
3. Step 3: Cross multiply
   2,017.68x = 2,784.69 × 1,231.56
4. Step 4: Simplify right side
   2,017.68x = 3,429,512.82
5. Step 5: Solve for x
   x = 3,429,512.82/2,017.68
6. Step 6: Final answer
   x = 1,699.73