Finding the Fourth Proportional to 1,444.89, 1,993.78 and 815.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,444.89 : 1,993.78 = 815.37 : x
2. Step 2: Convert to fraction form
   1,444.89/1,993.78 = 815.37/x
3. Step 3: Cross multiply
   1,444.89x = 1,993.78 × 815.37
4. Step 4: Simplify right side
   1,444.89x = 1,625,668.40
5. Step 5: Solve for x
   x = 1,625,668.40/1,444.89
6. Step 6: Final answer
   x = 1,125.12