Finding the Fourth Proportional to 1,353.48, 1,866.56 and 855.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.48 : 1,866.56 = 855.25 : x
2. Step 2: Convert to fraction form
   1,353.48/1,866.56 = 855.25/x
3. Step 3: Cross multiply
   1,353.48x = 1,866.56 × 855.25
4. Step 4: Simplify right side
   1,353.48x = 1,596,361.83
5. Step 5: Solve for x
   x = 1,596,361.83/1,353.48
6. Step 6: Final answer
   x = 1,179.45