Finding the Fourth Proportional to 2,007.67, 3,011.76 and 691.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.67 : 3,011.76 = 691.09 : x
2. Step 2: Convert to fraction form
   2,007.67/3,011.76 = 691.09/x
3. Step 3: Cross multiply
   2,007.67x = 3,011.76 × 691.09
4. Step 4: Simplify right side
   2,007.67x = 2,081,397.22
5. Step 5: Solve for x
   x = 2,081,397.22/2,007.67
6. Step 6: Final answer
   x = 1,036.72