Finding the Fourth Proportional to 2,117.89, 3,176.05 and 885.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.89 : 3,176.05 = 885.39 : x
2. Step 2: Convert to fraction form
   2,117.89/3,176.05 = 885.39/x
3. Step 3: Cross multiply
   2,117.89x = 3,176.05 × 885.39
4. Step 4: Simplify right side
   2,117.89x = 2,812,022.60
5. Step 5: Solve for x
   x = 2,812,022.60/2,117.89
6. Step 6: Final answer
   x = 1,327.75