Finding the Fourth Proportional to 2,118.42, 3,173.31 and 885.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.42 : 3,173.31 = 885.33 : x
2. Step 2: Convert to fraction form
   2,118.42/3,173.31 = 885.33/x
3. Step 3: Cross multiply
   2,118.42x = 3,173.31 × 885.33
4. Step 4: Simplify right side
   2,118.42x = 2,809,426.54
5. Step 5: Solve for x
   x = 2,809,426.54/2,118.42
6. Step 6: Final answer
   x = 1,326.19