Finding the Fourth Proportional to 1,553.62, 2,144.01 and 855.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.62 : 2,144.01 = 855.02 : x
2. Step 2: Convert to fraction form
   1,553.62/2,144.01 = 855.02/x
3. Step 3: Cross multiply
   1,553.62x = 2,144.01 × 855.02
4. Step 4: Simplify right side
   1,553.62x = 1,833,171.43
5. Step 5: Solve for x
   x = 1,833,171.43/1,553.62
6. Step 6: Final answer
   x = 1,179.94