Finding the Fourth Proportional to 2,191.55, 3,284.25 and 956.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.55 : 3,284.25 = 956.39 : x
2. Step 2: Convert to fraction form
   2,191.55/3,284.25 = 956.39/x
3. Step 3: Cross multiply
   2,191.55x = 3,284.25 × 956.39
4. Step 4: Simplify right side
   2,191.55x = 3,141,032.07
5. Step 5: Solve for x
   x = 3,141,032.07/2,191.55
6. Step 6: Final answer
   x = 1,433.25