Finding the Fourth Proportional to 1,553.94, 2,144.36 and 855.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.94 : 2,144.36 = 855.34 : x
2. Step 2: Convert to fraction form
   1,553.94/2,144.36 = 855.34/x
3. Step 3: Cross multiply
   1,553.94x = 2,144.36 × 855.34
4. Step 4: Simplify right side
   1,553.94x = 1,834,156.88
5. Step 5: Solve for x
   x = 1,834,156.88/1,553.94
6. Step 6: Final answer
   x = 1,180.33