Finding the Fourth Proportional to 2,081.59, 3,121.69 and 694.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.59 : 3,121.69 = 694.54 : x
2. Step 2: Convert to fraction form
   2,081.59/3,121.69 = 694.54/x
3. Step 3: Cross multiply
   2,081.59x = 3,121.69 × 694.54
4. Step 4: Simplify right side
   2,081.59x = 2,168,121.23
5. Step 5: Solve for x
   x = 2,168,121.23/2,081.59
6. Step 6: Final answer
   x = 1,041.57