Finding the Fourth Proportional to 2,431.40, 3,644.40 and 1,336.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.40 : 3,644.40 = 1,336.55 : x
2. Step 2: Convert to fraction form
   2,431.40/3,644.40 = 1,336.55/x
3. Step 3: Cross multiply
   2,431.40x = 3,644.40 × 1,336.55
4. Step 4: Simplify right side
   2,431.40x = 4,870,922.82
5. Step 5: Solve for x
   x = 4,870,922.82/2,431.40
6. Step 6: Final answer
   x = 2,003.34