Finding the Fourth Proportional to 3,405.96, 5,100.30 and 2,103.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,405.96 : 5,100.30 = 2,103.48 : x
2. Step 2: Convert to fraction form
   3,405.96/5,100.30 = 2,103.48/x
3. Step 3: Cross multiply
   3,405.96x = 5,100.30 × 2,103.48
4. Step 4: Simplify right side
   3,405.96x = 10,728,379.04
5. Step 5: Solve for x
   x = 10,728,379.04/3,405.96
6. Step 6: Final answer
   x = 3,149.88