Finding the Fourth Proportional to 3,945.30, 5,443.14 and 2,265.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945.30 : 5,443.14 = 2,265.54 : x
2. Step 2: Convert to fraction form
   3,945.30/5,443.14 = 2,265.54/x
3. Step 3: Cross multiply
   3,945.30x = 5,443.14 × 2,265.54
4. Step 4: Simplify right side
   3,945.30x = 12,331,651.40
5. Step 5: Solve for x
   x = 12,331,651.40/3,945.30
6. Step 6: Final answer
   x = 3,125.66