Finding the Fourth Proportional to 2,191.16, 3,288.88 and 959.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.16 : 3,288.88 = 959.42 : x
2. Step 2: Convert to fraction form
   2,191.16/3,288.88 = 959.42/x
3. Step 3: Cross multiply
   2,191.16x = 3,288.88 × 959.42
4. Step 4: Simplify right side
   2,191.16x = 3,155,417.25
5. Step 5: Solve for x
   x = 3,155,417.25/2,191.16
6. Step 6: Final answer
   x = 1,440.07