Finding the Fourth Proportional to 3,411.04, 5,103.60 and 2,109.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,411.04 : 5,103.60 = 2,109.28 : x
2. Step 2: Convert to fraction form
   3,411.04/5,103.60 = 2,109.28/x
3. Step 3: Cross multiply
   3,411.04x = 5,103.60 × 2,109.28
4. Step 4: Simplify right side
   3,411.04x = 10,764,921.41
5. Step 5: Solve for x
   x = 10,764,921.41/3,411.04
6. Step 6: Final answer
   x = 3,155.91