Finding the Fourth Proportional to 3,556.28, 5,333.60 and 959.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,556.28 : 5,333.60 = 959.42 : x
2. Step 2: Convert to fraction form
   3,556.28/5,333.60 = 959.42/x
3. Step 3: Cross multiply
   3,556.28x = 5,333.60 × 959.42
4. Step 4: Simplify right side
   3,556.28x = 5,117,162.51
5. Step 5: Solve for x
   x = 5,117,162.51/3,556.28
6. Step 6: Final answer
   x = 1,438.91