Finding the Fourth Proportional to 2,080.67, 3,121.47 and 694.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.67 : 3,121.47 = 694.15 : x
2. Step 2: Convert to fraction form
   2,080.67/3,121.47 = 694.15/x
3. Step 3: Cross multiply
   2,080.67x = 3,121.47 × 694.15
4. Step 4: Simplify right side
   2,080.67x = 2,166,760.60
5. Step 5: Solve for x
   x = 2,166,760.60/2,080.67
6. Step 6: Final answer
   x = 1,041.38