Finding the Fourth Proportional to 2,081.16, 3,120.72 and 694.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.16 : 3,120.72 = 694.02 : x
2. Step 2: Convert to fraction form
   2,081.16/3,120.72 = 694.02/x
3. Step 3: Cross multiply
   2,081.16x = 3,120.72 × 694.02
4. Step 4: Simplify right side
   2,081.16x = 2,165,842.09
5. Step 5: Solve for x
   x = 2,165,842.09/2,081.16
6. Step 6: Final answer
   x = 1,040.69