Finding the Fourth Proportional to 3,425.31, 5,137.71 and 2,109.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,425.31 : 5,137.71 = 2,109.27 : x
2. Step 2: Convert to fraction form
   3,425.31/5,137.71 = 2,109.27/x
3. Step 3: Cross multiply
   3,425.31x = 5,137.71 × 2,109.27
4. Step 4: Simplify right side
   3,425.31x = 10,836,817.57
5. Step 5: Solve for x
   x = 10,836,817.57/3,425.31
6. Step 6: Final answer
   x = 3,163.75