Finding the Fourth Proportional to 5,423.82, 8,138.46 and 2,139.27

Step by Step Solution

1. Step 1: Write the proportion equation
   5,423.82 : 8,138.46 = 2,139.27 : x
2. Step 2: Convert to fraction form
   5,423.82/8,138.46 = 2,139.27/x
3. Step 3: Cross multiply
   5,423.82x = 8,138.46 × 2,139.27
4. Step 4: Simplify right side
   5,423.82x = 17,410,363.32
5. Step 5: Solve for x
   x = 17,410,363.32/5,423.82
6. Step 6: Final answer
   x = 3,209.98