Finding the Fourth Proportional to 1,445.54, 1,994.73 and 855.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.54 : 1,994.73 = 855.86 : x
2. Step 2: Convert to fraction form
   1,445.54/1,994.73 = 855.86/x
3. Step 3: Cross multiply
   1,445.54x = 1,994.73 × 855.86
4. Step 4: Simplify right side
   1,445.54x = 1,707,199.64
5. Step 5: Solve for x
   x = 1,707,199.64/1,445.54
6. Step 6: Final answer
   x = 1,181.02