Finding the Fourth Proportional to 2,359.23, 3,255.87 and 1,311.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,359.23 : 3,255.87 = 1,311.30 : x
2. Step 2: Convert to fraction form
   2,359.23/3,255.87 = 1,311.30/x
3. Step 3: Cross multiply
   2,359.23x = 3,255.87 × 1,311.30
4. Step 4: Simplify right side
   2,359.23x = 4,269,422.33
5. Step 5: Solve for x
   x = 4,269,422.33/2,359.23
6. Step 6: Final answer
   x = 1,809.67