Finding the Fourth Proportional to 2,287.58, 3,429.31 and 825.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.58 : 3,429.31 = 825.71 : x
2. Step 2: Convert to fraction form
   2,287.58/3,429.31 = 825.71/x
3. Step 3: Cross multiply
   2,287.58x = 3,429.31 × 825.71
4. Step 4: Simplify right side
   2,287.58x = 2,831,615.56
5. Step 5: Solve for x
   x = 2,831,615.56/2,287.58
6. Step 6: Final answer
   x = 1,237.82