Finding the Fourth Proportional to 1,353.41, 1,867.23 and 855.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.41 : 1,867.23 = 855.89 : x
2. Step 2: Convert to fraction form
   1,353.41/1,867.23 = 855.89/x
3. Step 3: Cross multiply
   1,353.41x = 1,867.23 × 855.89
4. Step 4: Simplify right side
   1,353.41x = 1,598,143.48
5. Step 5: Solve for x
   x = 1,598,143.48/1,353.41
6. Step 6: Final answer
   x = 1,180.83