Finding the Fourth Proportional to 2,306.19, 3,182.31 and 1,311.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,306.19 : 3,182.31 = 1,311.57 : x
2. Step 2: Convert to fraction form
   2,306.19/3,182.31 = 1,311.57/x
3. Step 3: Cross multiply
   2,306.19x = 3,182.31 × 1,311.57
4. Step 4: Simplify right side
   2,306.19x = 4,173,822.33
5. Step 5: Solve for x
   x = 4,173,822.33/2,306.19
6. Step 6: Final answer
   x = 1,809.83