Finding the Fourth Proportional to 1,443.86, 1,992.42 and 814.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.86 : 1,992.42 = 814.40 : x
2. Step 2: Convert to fraction form
   1,443.86/1,992.42 = 814.40/x
3. Step 3: Cross multiply
   1,443.86x = 1,992.42 × 814.40
4. Step 4: Simplify right side
   1,443.86x = 1,622,631.83
5. Step 5: Solve for x
   x = 1,622,631.83/1,443.86
6. Step 6: Final answer
   x = 1,123.82