Finding the Fourth Proportional to 1,444.86, 1,993.74 and 855.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,444.86 : 1,993.74 = 855.30 : x
2. Step 2: Convert to fraction form
   1,444.86/1,993.74 = 855.30/x
3. Step 3: Cross multiply
   1,444.86x = 1,993.74 × 855.30
4. Step 4: Simplify right side
   1,444.86x = 1,705,245.82
5. Step 5: Solve for x
   x = 1,705,245.82/1,444.86
6. Step 6: Final answer
   x = 1,180.22