Finding the Fourth Proportional to 2,188.82, 3,284.68 and 956.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.82 : 3,284.68 = 956.28 : x
2. Step 2: Convert to fraction form
   2,188.82/3,284.68 = 956.28/x
3. Step 3: Cross multiply
   2,188.82x = 3,284.68 × 956.28
4. Step 4: Simplify right side
   2,188.82x = 3,141,073.79
5. Step 5: Solve for x
   x = 3,141,073.79/2,188.82
6. Step 6: Final answer
   x = 1,435.05