Finding the Fourth Proportional to 2,118.91, 3,175.38 and 885.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.91 : 3,175.38 = 885.55 : x
2. Step 2: Convert to fraction form
   2,118.91/3,175.38 = 885.55/x
3. Step 3: Cross multiply
   2,118.91x = 3,175.38 × 885.55
4. Step 4: Simplify right side
   2,118.91x = 2,811,957.76
5. Step 5: Solve for x
   x = 2,811,957.76/2,118.91
6. Step 6: Final answer
   x = 1,327.08