Finding the Fourth Proportional to 2,017.60, 2,784.24 and 1,231.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.60 : 2,784.24 = 1,231.84 : x
2. Step 2: Convert to fraction form
   2,017.60/2,784.24 = 1,231.84/x
3. Step 3: Cross multiply
   2,017.60x = 2,784.24 × 1,231.84
4. Step 4: Simplify right side
   2,017.60x = 3,429,738.20
5. Step 5: Solve for x
   x = 3,429,738.20/2,017.60
6. Step 6: Final answer
   x = 1,699.91