Finding the Fourth Proportional to 1,553.88, 2,144.36 and 855.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.88 : 2,144.36 = 855.25 : x
2. Step 2: Convert to fraction form
   1,553.88/2,144.36 = 855.25/x
3. Step 3: Cross multiply
   1,553.88x = 2,144.36 × 855.25
4. Step 4: Simplify right side
   1,553.88x = 1,833,963.89
5. Step 5: Solve for x
   x = 1,833,963.89/1,553.88
6. Step 6: Final answer
   x = 1,180.25