Finding the Fourth Proportional to 2,867.28, 4,300.37 and 1,306.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,867.28 : 4,300.37 = 1,306.85 : x
2. Step 2: Convert to fraction form
   2,867.28/4,300.37 = 1,306.85/x
3. Step 3: Cross multiply
   2,867.28x = 4,300.37 × 1,306.85
4. Step 4: Simplify right side
   2,867.28x = 5,619,910.50
5. Step 5: Solve for x
   x = 5,619,910.50/2,867.28
6. Step 6: Final answer
   x = 1,960.01