Finding the Fourth Proportional to 3,020.57, 4,529.41 and 1,288.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,020.57 : 4,529.41 = 1,288.25 : x
2. Step 2: Convert to fraction form
   3,020.57/4,529.41 = 1,288.25/x
3. Step 3: Cross multiply
   3,020.57x = 4,529.41 × 1,288.25
4. Step 4: Simplify right side
   3,020.57x = 5,835,012.43
5. Step 5: Solve for x
   x = 5,835,012.43/3,020.57
6. Step 6: Final answer
   x = 1,931.76