Finding the Fourth Proportional to 1,553.94, 2,144.34 and 855.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.94 : 2,144.34 = 855.32 : x
2. Step 2: Convert to fraction form
   1,553.94/2,144.34 = 855.32/x
3. Step 3: Cross multiply
   1,553.94x = 2,144.34 × 855.32
4. Step 4: Simplify right side
   1,553.94x = 1,834,086.17
5. Step 5: Solve for x
   x = 1,834,086.17/1,553.94
6. Step 6: Final answer
   x = 1,180.28