Finding the Fourth Proportional to 3,128.41, 4,691.17 and 936.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.41 : 4,691.17 = 936.69 : x
2. Step 2: Convert to fraction form
   3,128.41/4,691.17 = 936.69/x
3. Step 3: Cross multiply
   3,128.41x = 4,691.17 × 936.69
4. Step 4: Simplify right side
   3,128.41x = 4,394,172.03
5. Step 5: Solve for x
   x = 4,394,172.03/3,128.41
6. Step 6: Final answer
   x = 1,404.60