Finding the Fourth Proportional to 2,191.40, 3,284.28 and 958.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.40 : 3,284.28 = 958.46 : x
2. Step 2: Convert to fraction form
   2,191.40/3,284.28 = 958.46/x
3. Step 3: Cross multiply
   2,191.40x = 3,284.28 × 958.46
4. Step 4: Simplify right side
   2,191.40x = 3,147,851.01
5. Step 5: Solve for x
   x = 3,147,851.01/2,191.40
6. Step 6: Final answer
   x = 1,436.46