Finding the Fourth Proportional to 978.69, 1,350.14 and 936.03

Step by Step Solution

1. Step 1: Write the proportion equation
   978.69 : 1,350.14 = 936.03 : x
2. Step 2: Convert to fraction form
   978.69/1,350.14 = 936.03/x
3. Step 3: Cross multiply
   978.69x = 1,350.14 × 936.03
4. Step 4: Simplify right side
   978.69x = 1,263,766.86
5. Step 5: Solve for x
   x = 1,263,766.86/978.69
6. Step 6: Final answer
   x = 1,291.28