Finding the Fourth Proportional to 2,007.31, 3,011.47 and 774.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.31 : 3,011.47 = 774.39 : x
2. Step 2: Convert to fraction form
   2,007.31/3,011.47 = 774.39/x
3. Step 3: Cross multiply
   2,007.31x = 3,011.47 × 774.39
4. Step 4: Simplify right side
   2,007.31x = 2,332,038.38
5. Step 5: Solve for x
   x = 2,332,038.38/2,007.31
6. Step 6: Final answer
   x = 1,161.77