Finding the Fourth Proportional to 2,288.54, 3,158.18 and 1,240.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.54 : 3,158.18 = 1,240.61 : x
2. Step 2: Convert to fraction form
   2,288.54/3,158.18 = 1,240.61/x
3. Step 3: Cross multiply
   2,288.54x = 3,158.18 × 1,240.61
4. Step 4: Simplify right side
   2,288.54x = 3,918,052.35
5. Step 5: Solve for x
   x = 3,918,052.35/2,288.54
6. Step 6: Final answer
   x = 1,712.03