Finding the Fourth Proportional to 2,188.18, 3,284.12 and 956.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.18 : 3,284.12 = 956.58 : x
2. Step 2: Convert to fraction form
   2,188.18/3,284.12 = 956.58/x
3. Step 3: Cross multiply
   2,188.18x = 3,284.12 × 956.58
4. Step 4: Simplify right side
   2,188.18x = 3,141,523.51
5. Step 5: Solve for x
   x = 3,141,523.51/2,188.18
6. Step 6: Final answer
   x = 1,435.68