Finding the Fourth Proportional to 2,005.31, 3,007.71 and 835.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,005.31 : 3,007.71 = 835.45 : x
2. Step 2: Convert to fraction form
   2,005.31/3,007.71 = 835.45/x
3. Step 3: Cross multiply
   2,005.31x = 3,007.71 × 835.45
4. Step 4: Simplify right side
   2,005.31x = 2,512,791.32
5. Step 5: Solve for x
   x = 2,512,791.32/2,005.31
6. Step 6: Final answer
   x = 1,253.07