Finding the Fourth Proportional to 9,249.15, 13,875.10 and 3,405.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,249.15 : 13,875.10 = 3,405.31 : x
2. Step 2: Convert to fraction form
   9,249.15/13,875.10 = 3,405.31/x
3. Step 3: Cross multiply
   9,249.15x = 13,875.10 × 3,405.31
4. Step 4: Simplify right side
   9,249.15x = 47,249,016.78
5. Step 5: Solve for x
   x = 47,249,016.78/9,249.15
6. Step 6: Final answer
   x = 5,108.47