Finding the Fourth Proportional to 1,554.43, 2,145.17 and 855.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.43 : 2,145.17 = 855.82 : x
2. Step 2: Convert to fraction form
   1,554.43/2,145.17 = 855.82/x
3. Step 3: Cross multiply
   1,554.43x = 2,145.17 × 855.82
4. Step 4: Simplify right side
   1,554.43x = 1,835,875.11
5. Step 5: Solve for x
   x = 1,835,875.11/1,554.43
6. Step 6: Final answer
   x = 1,181.06