Finding the Fourth Proportional to 1,443.57, 1,992.15 and 814.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.57 : 1,992.15 = 814.13 : x
2. Step 2: Convert to fraction form
   1,443.57/1,992.15 = 814.13/x
3. Step 3: Cross multiply
   1,443.57x = 1,992.15 × 814.13
4. Step 4: Simplify right side
   1,443.57x = 1,621,862.06
5. Step 5: Solve for x
   x = 1,621,862.06/1,443.57
6. Step 6: Final answer
   x = 1,123.51