Finding the Fourth Proportional to 2,187.90, 3,284.00 and 956.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.90 : 3,284.00 = 956.16 : x
2. Step 2: Convert to fraction form
   2,187.90/3,284.00 = 956.16/x
3. Step 3: Cross multiply
   2,187.90x = 3,284.00 × 956.16
4. Step 4: Simplify right side
   2,187.90x = 3,140,015.41
5. Step 5: Solve for x
   x = 3,140,015.41/2,187.90
6. Step 6: Final answer
   x = 1,435.18