Finding the Fourth Proportional to 3,128.05, 4,691.37 and 936.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.05 : 4,691.37 = 936.50 : x
2. Step 2: Convert to fraction form
   3,128.05/4,691.37 = 936.50/x
3. Step 3: Cross multiply
   3,128.05x = 4,691.37 × 936.50
4. Step 4: Simplify right side
   3,128.05x = 4,393,444.55
5. Step 5: Solve for x
   x = 4,393,444.55/3,128.05
6. Step 6: Final answer
   x = 1,404.53