Finding the Fourth Proportional to 2,431.62, 3,355.83 and 1,383.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.62 : 3,355.83 = 1,383.89 : x
2. Step 2: Convert to fraction form
   2,431.62/3,355.83 = 1,383.89/x
3. Step 3: Cross multiply
   2,431.62x = 3,355.83 × 1,383.89
4. Step 4: Simplify right side
   2,431.62x = 4,644,082.80
5. Step 5: Solve for x
   x = 4,644,082.80/2,431.62
6. Step 6: Final answer
   x = 1,909.87