Finding the Fourth Proportional to 2,081.17, 3,120.71 and 694.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.17 : 3,120.71 = 694.03 : x
2. Step 2: Convert to fraction form
   2,081.17/3,120.71 = 694.03/x
3. Step 3: Cross multiply
   2,081.17x = 3,120.71 × 694.03
4. Step 4: Simplify right side
   2,081.17x = 2,165,847.29
5. Step 5: Solve for x
   x = 2,165,847.29/2,081.17
6. Step 6: Final answer
   x = 1,040.69