Finding the Fourth Proportional to 2,406.31, 3,609.77 and 945.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,406.31 : 3,609.77 = 945.57 : x
2. Step 2: Convert to fraction form
   2,406.31/3,609.77 = 945.57/x
3. Step 3: Cross multiply
   2,406.31x = 3,609.77 × 945.57
4. Step 4: Simplify right side
   2,406.31x = 3,413,299.03
5. Step 5: Solve for x
   x = 3,413,299.03/2,406.31
6. Step 6: Final answer
   x = 1,418.48