Finding the Fourth Proportional to 1,445.04, 1,994.12 and 855.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.04 : 1,994.12 = 855.56 : x
2. Step 2: Convert to fraction form
   1,445.04/1,994.12 = 855.56/x
3. Step 3: Cross multiply
   1,445.04x = 1,994.12 × 855.56
4. Step 4: Simplify right side
   1,445.04x = 1,706,093.22
5. Step 5: Solve for x
   x = 1,706,093.22/1,445.04
6. Step 6: Final answer
   x = 1,180.65