Finding the Fourth Proportional to 1,554.05, 2,144.59 and 855.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.05 : 2,144.59 = 855.43 : x
2. Step 2: Convert to fraction form
   1,554.05/2,144.59 = 855.43/x
3. Step 3: Cross multiply
   1,554.05x = 2,144.59 × 855.43
4. Step 4: Simplify right side
   1,554.05x = 1,834,539.12
5. Step 5: Solve for x
   x = 1,834,539.12/1,554.05
6. Step 6: Final answer
   x = 1,180.49