Finding the Fourth Proportional to 2,228.81, 3,076.57 and 1,297.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,228.81 : 3,076.57 = 1,297.31 : x
2. Step 2: Convert to fraction form
   2,228.81/3,076.57 = 1,297.31/x
3. Step 3: Cross multiply
   2,228.81x = 3,076.57 × 1,297.31
4. Step 4: Simplify right side
   2,228.81x = 3,991,265.03
5. Step 5: Solve for x
   x = 3,991,265.03/2,228.81
6. Step 6: Final answer
   x = 1,790.76