Finding the Fourth Proportional to 2,288.75, 3,158.48 and 1,240.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.75 : 3,158.48 = 1,240.82 : x
2. Step 2: Convert to fraction form
   2,288.75/3,158.48 = 1,240.82/x
3. Step 3: Cross multiply
   2,288.75x = 3,158.48 × 1,240.82
4. Step 4: Simplify right side
   2,288.75x = 3,919,083.16
5. Step 5: Solve for x
   x = 3,919,083.16/2,288.75
6. Step 6: Final answer
   x = 1,712.32