Finding the Fourth Proportional to 1,352.79, 1,867.12 and 855.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,352.79 : 1,867.12 = 855.18 : x
2. Step 2: Convert to fraction form
   1,352.79/1,867.12 = 855.18/x
3. Step 3: Cross multiply
   1,352.79x = 1,867.12 × 855.18
4. Step 4: Simplify right side
   1,352.79x = 1,596,721.54
5. Step 5: Solve for x
   x = 1,596,721.54/1,352.79
6. Step 6: Final answer
   x = 1,180.32