Finding the Fourth Proportional to 2,359.45, 3,255.82 and 1,311.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,359.45 : 3,255.82 = 1,311.31 : x
2. Step 2: Convert to fraction form
   2,359.45/3,255.82 = 1,311.31/x
3. Step 3: Cross multiply
   2,359.45x = 3,255.82 × 1,311.31
4. Step 4: Simplify right side
   2,359.45x = 4,269,389.32
5. Step 5: Solve for x
   x = 4,269,389.32/2,359.45
6. Step 6: Final answer
   x = 1,809.48