Finding the Fourth Proportional to 1,443.63, 1,992.20 and 814.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.63 : 1,992.20 = 814.20 : x
2. Step 2: Convert to fraction form
   1,443.63/1,992.20 = 814.20/x
3. Step 3: Cross multiply
   1,443.63x = 1,992.20 × 814.20
4. Step 4: Simplify right side
   1,443.63x = 1,622,049.24
5. Step 5: Solve for x
   x = 1,622,049.24/1,443.63
6. Step 6: Final answer
   x = 1,123.59