Finding the Fourth Proportional to 1,554.07, 2,144.61 and 855.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.07 : 2,144.61 = 855.45 : x
2. Step 2: Convert to fraction form
   1,554.07/2,144.61 = 855.45/x
3. Step 3: Cross multiply
   1,554.07x = 2,144.61 × 855.45
4. Step 4: Simplify right side
   1,554.07x = 1,834,606.62
5. Step 5: Solve for x
   x = 1,834,606.62/1,554.07
6. Step 6: Final answer
   x = 1,180.52