Finding the Fourth Proportional to 1,443.43, 1,990.62 and 945.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.43 : 1,990.62 = 945.88 : x
2. Step 2: Convert to fraction form
   1,443.43/1,990.62 = 945.88/x
3. Step 3: Cross multiply
   1,443.43x = 1,990.62 × 945.88
4. Step 4: Simplify right side
   1,443.43x = 1,882,882.92
5. Step 5: Solve for x
   x = 1,882,882.92/1,443.43
6. Step 6: Final answer
   x = 1,304.45