Finding the Fourth Proportional to 2,288.42, 3,157.94 and 1,240.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.42 : 3,157.94 = 1,240.46 : x
2. Step 2: Convert to fraction form
   2,288.42/3,157.94 = 1,240.46/x
3. Step 3: Cross multiply
   2,288.42x = 3,157.94 × 1,240.46
4. Step 4: Simplify right side
   2,288.42x = 3,917,292.05
5. Step 5: Solve for x
   x = 3,917,292.05/2,288.42
6. Step 6: Final answer
   x = 1,711.79