Finding the Fourth Proportional to 2,081.41, 3,122.66 and 985.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.41 : 3,122.66 = 985.75 : x
2. Step 2: Convert to fraction form
   2,081.41/3,122.66 = 985.75/x
3. Step 3: Cross multiply
   2,081.41x = 3,122.66 × 985.75
4. Step 4: Simplify right side
   2,081.41x = 3,078,162.10
5. Step 5: Solve for x
   x = 3,078,162.10/2,081.41
6. Step 6: Final answer
   x = 1,478.88