Finding the Fourth Proportional to 1,353.34, 1,865.75 and 855.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.34 : 1,865.75 = 855.73 : x
2. Step 2: Convert to fraction form
   1,353.34/1,865.75 = 855.73/x
3. Step 3: Cross multiply
   1,353.34x = 1,865.75 × 855.73
4. Step 4: Simplify right side
   1,353.34x = 1,596,578.25
5. Step 5: Solve for x
   x = 1,596,578.25/1,353.34
6. Step 6: Final answer
   x = 1,179.73