Finding the Fourth Proportional to 1,518.71, 2,095.78 and 855.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,518.71 : 2,095.78 = 855.55 : x
2. Step 2: Convert to fraction form
   1,518.71/2,095.78 = 855.55/x
3. Step 3: Cross multiply
   1,518.71x = 2,095.78 × 855.55
4. Step 4: Simplify right side
   1,518.71x = 1,793,042.44
5. Step 5: Solve for x
   x = 1,793,042.44/1,518.71
6. Step 6: Final answer
   x = 1,180.63