Finding the Fourth Proportional to 1,554.23, 2,144.82 and 855.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.23 : 2,144.82 = 855.59 : x
2. Step 2: Convert to fraction form
   1,554.23/2,144.82 = 855.59/x
3. Step 3: Cross multiply
   1,554.23x = 2,144.82 × 855.59
4. Step 4: Simplify right side
   1,554.23x = 1,835,086.54
5. Step 5: Solve for x
   x = 1,835,086.54/1,554.23
6. Step 6: Final answer
   x = 1,180.70