Finding the Fourth Proportional to 2,118.17, 3,176.86 and 885.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.17 : 3,176.86 = 885.25 : x
2. Step 2: Convert to fraction form
   2,118.17/3,176.86 = 885.25/x
3. Step 3: Cross multiply
   2,118.17x = 3,176.86 × 885.25
4. Step 4: Simplify right side
   2,118.17x = 2,812,305.16
5. Step 5: Solve for x
   x = 2,812,305.16/2,118.17
6. Step 6: Final answer
   x = 1,327.71