Finding the Fourth Proportional to 1,554.15, 2,144.73 and 855.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.15 : 2,144.73 = 855.53 : x
2. Step 2: Convert to fraction form
   1,554.15/2,144.73 = 855.53/x
3. Step 3: Cross multiply
   1,554.15x = 2,144.73 × 855.53
4. Step 4: Simplify right side
   1,554.15x = 1,834,878.18
5. Step 5: Solve for x
   x = 1,834,878.18/1,554.15
6. Step 6: Final answer
   x = 1,180.63