Finding the Fourth Proportional to 2,311.10, 3,189.32 and 1,426.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.10 : 3,189.32 = 1,426.91 : x
2. Step 2: Convert to fraction form
   2,311.10/3,189.32 = 1,426.91/x
3. Step 3: Cross multiply
   2,311.10x = 3,189.32 × 1,426.91
4. Step 4: Simplify right side
   2,311.10x = 4,550,872.60
5. Step 5: Solve for x
   x = 4,550,872.60/2,311.10
6. Step 6: Final answer
   x = 1,969.14