Finding the Fourth Proportional to 1,443.22, 2,164.81 and 956.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.22 : 2,164.81 = 956.15 : x
2. Step 2: Convert to fraction form
   1,443.22/2,164.81 = 956.15/x
3. Step 3: Cross multiply
   1,443.22x = 2,164.81 × 956.15
4. Step 4: Simplify right side
   1,443.22x = 2,069,883.08
5. Step 5: Solve for x
   x = 2,069,883.08/1,443.22
6. Step 6: Final answer
   x = 1,434.21