Finding the Fourth Proportional to 1,554.04, 2,144.50 and 855.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.04 : 2,144.50 = 855.40 : x
2. Step 2: Convert to fraction form
   1,554.04/2,144.50 = 855.40/x
3. Step 3: Cross multiply
   1,554.04x = 2,144.50 × 855.40
4. Step 4: Simplify right side
   1,554.04x = 1,834,405.30
5. Step 5: Solve for x
   x = 1,834,405.30/1,554.04
6. Step 6: Final answer
   x = 1,180.41