Finding the Fourth Proportional to 2,168.05, 2,993.20 and 1,423.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.05 : 2,993.20 = 1,423.31 : x
2. Step 2: Convert to fraction form
   2,168.05/2,993.20 = 1,423.31/x
3. Step 3: Cross multiply
   2,168.05x = 2,993.20 × 1,423.31
4. Step 4: Simplify right side
   2,168.05x = 4,260,264.50
5. Step 5: Solve for x
   x = 4,260,264.50/2,168.05
6. Step 6: Final answer
   x = 1,965.02