Finding the Fourth Proportional to 2,181.56, 3,269.70 and 864.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.56 : 3,269.70 = 864.09 : x
2. Step 2: Convert to fraction form
   2,181.56/3,269.70 = 864.09/x
3. Step 3: Cross multiply
   2,181.56x = 3,269.70 × 864.09
4. Step 4: Simplify right side
   2,181.56x = 2,825,315.07
5. Step 5: Solve for x
   x = 2,825,315.07/2,181.56
6. Step 6: Final answer
   x = 1,295.09