Finding the Fourth Proportional to 1,100.48, 1,648.65 and 855.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.48 : 1,648.65 = 855.82 : x
2. Step 2: Convert to fraction form
   1,100.48/1,648.65 = 855.82/x
3. Step 3: Cross multiply
   1,100.48x = 1,648.65 × 855.82
4. Step 4: Simplify right side
   1,100.48x = 1,410,947.64
5. Step 5: Solve for x
   x = 1,410,947.64/1,100.48
6. Step 6: Final answer
   x = 1,282.12