Finding the Fourth Proportional to 3,930.34, 5,423.96 and 2,162.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,930.34 : 5,423.96 = 2,162.05 : x
2. Step 2: Convert to fraction form
   3,930.34/5,423.96 = 2,162.05/x
3. Step 3: Cross multiply
   3,930.34x = 5,423.96 × 2,162.05
4. Step 4: Simplify right side
   3,930.34x = 11,726,872.72
5. Step 5: Solve for x
   x = 11,726,872.72/3,930.34
6. Step 6: Final answer
   x = 2,983.68