Finding the Fourth Proportional to 2,311.30, 3,189.09 and 1,367.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.30 : 3,189.09 = 1,367.15 : x
2. Step 2: Convert to fraction form
   2,311.30/3,189.09 = 1,367.15/x
3. Step 3: Cross multiply
   2,311.30x = 3,189.09 × 1,367.15
4. Step 4: Simplify right side
   2,311.30x = 4,359,948.45
5. Step 5: Solve for x
   x = 4,359,948.45/2,311.30
6. Step 6: Final answer
   x = 1,886.36