Finding the Fourth Proportional to 1,444.86, 1,993.77 and 815.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,444.86 : 1,993.77 = 815.31 : x
2. Step 2: Convert to fraction form
   1,444.86/1,993.77 = 815.31/x
3. Step 3: Cross multiply
   1,444.86x = 1,993.77 × 815.31
4. Step 4: Simplify right side
   1,444.86x = 1,625,540.62
5. Step 5: Solve for x
   x = 1,625,540.62/1,444.86
6. Step 6: Final answer
   x = 1,125.05