Finding the Fourth Proportional to 1,443.20, 1,992.18 and 945.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.20 : 1,992.18 = 945.68 : x
2. Step 2: Convert to fraction form
   1,443.20/1,992.18 = 945.68/x
3. Step 3: Cross multiply
   1,443.20x = 1,992.18 × 945.68
4. Step 4: Simplify right side
   1,443.20x = 1,883,964.78
5. Step 5: Solve for x
   x = 1,883,964.78/1,443.20
6. Step 6: Final answer
   x = 1,305.41