Finding the Fourth Proportional to 3,938.10, 5,434.37 and 2,169.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938.10 : 5,434.37 = 2,169.37 : x
2. Step 2: Convert to fraction form
   3,938.10/5,434.37 = 2,169.37/x
3. Step 3: Cross multiply
   3,938.10x = 5,434.37 × 2,169.37
4. Step 4: Simplify right side
   3,938.10x = 11,789,148.40
5. Step 5: Solve for x
   x = 11,789,148.40/3,938.10
6. Step 6: Final answer
   x = 2,993.62