Finding the Fourth Proportional to 2,431.89, 3,646.23 and 871.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.89 : 3,646.23 = 871.10 : x
2. Step 2: Convert to fraction form
   2,431.89/3,646.23 = 871.10/x
3. Step 3: Cross multiply
   2,431.89x = 3,646.23 × 871.10
4. Step 4: Simplify right side
   2,431.89x = 3,176,248.54
5. Step 5: Solve for x
   x = 3,176,248.54/2,431.89
6. Step 6: Final answer
   x = 1,306.08