Finding the Fourth Proportional to 2,431.02, 3,647.31 and 869.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.02 : 3,647.31 = 869.96 : x
2. Step 2: Convert to fraction form
   2,431.02/3,647.31 = 869.96/x
3. Step 3: Cross multiply
   2,431.02x = 3,647.31 × 869.96
4. Step 4: Simplify right side
   2,431.02x = 3,173,022.93
5. Step 5: Solve for x
   x = 3,173,022.93/2,431.02
6. Step 6: Final answer
   x = 1,305.22