Finding the Fourth Proportional to 1,375.06, 2,063.61 and 855.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.06 : 2,063.61 = 855.83 : x
2. Step 2: Convert to fraction form
   1,375.06/2,063.61 = 855.83/x
3. Step 3: Cross multiply
   1,375.06x = 2,063.61 × 855.83
4. Step 4: Simplify right side
   1,375.06x = 1,766,099.35
5. Step 5: Solve for x
   x = 1,766,099.35/1,375.06
6. Step 6: Final answer
   x = 1,284.38