Finding the Fourth Proportional to 2,311.32, 3,189.54 and 1,367.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.32 : 3,189.54 = 1,367.28 : x
2. Step 2: Convert to fraction form
   2,311.32/3,189.54 = 1,367.28/x
3. Step 3: Cross multiply
   2,311.32x = 3,189.54 × 1,367.28
4. Step 4: Simplify right side
   2,311.32x = 4,360,994.25
5. Step 5: Solve for x
   x = 4,360,994.25/2,311.32
6. Step 6: Final answer
   x = 1,886.80