Finding the Fourth Proportional to 2,312.69, 3,469.03 and 581.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,312.69 : 3,469.03 = 581.31 : x
2. Step 2: Convert to fraction form
   2,312.69/3,469.03 = 581.31/x
3. Step 3: Cross multiply
   2,312.69x = 3,469.03 × 581.31
4. Step 4: Simplify right side
   2,312.69x = 2,016,581.83
5. Step 5: Solve for x
   x = 2,016,581.83/2,312.69
6. Step 6: Final answer
   x = 871.97