Finding the Fourth Proportional to 2,288.38, 3,157.97 and 1,240.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.38 : 3,157.97 = 1,240.45 : x
2. Step 2: Convert to fraction form
   2,288.38/3,157.97 = 1,240.45/x
3. Step 3: Cross multiply
   2,288.38x = 3,157.97 × 1,240.45
4. Step 4: Simplify right side
   2,288.38x = 3,917,303.89
5. Step 5: Solve for x
   x = 3,917,303.89/2,288.38
6. Step 6: Final answer
   x = 1,711.82