Finding the Fourth Proportional to 1,445.22, 1,994.15 and 855.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.22 : 1,994.15 = 855.54 : x
2. Step 2: Convert to fraction form
   1,445.22/1,994.15 = 855.54/x
3. Step 3: Cross multiply
   1,445.22x = 1,994.15 × 855.54
4. Step 4: Simplify right side
   1,445.22x = 1,706,070.81
5. Step 5: Solve for x
   x = 1,706,070.81/1,445.22
6. Step 6: Final answer
   x = 1,180.49