Finding the Fourth Proportional to 2,118.35, 3,176.72 and 885.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.35 : 3,176.72 = 885.13 : x
2. Step 2: Convert to fraction form
   2,118.35/3,176.72 = 885.13/x
3. Step 3: Cross multiply
   2,118.35x = 3,176.72 × 885.13
4. Step 4: Simplify right side
   2,118.35x = 2,811,801.13
5. Step 5: Solve for x
   x = 2,811,801.13/2,118.35
6. Step 6: Final answer
   x = 1,327.35