Finding the Fourth Proportional to 2,359.58, 3,256.23 and 1,311.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,359.58 : 3,256.23 = 1,311.65 : x
2. Step 2: Convert to fraction form
   2,359.58/3,256.23 = 1,311.65/x
3. Step 3: Cross multiply
   2,359.58x = 3,256.23 × 1,311.65
4. Step 4: Simplify right side
   2,359.58x = 4,271,017.80
5. Step 5: Solve for x
   x = 4,271,017.80/2,359.58
6. Step 6: Final answer
   x = 1,810.08