Finding the Fourth Proportional to 2,288.24, 3,157.76 and 1,240.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.24 : 3,157.76 = 1,240.30 : x
2. Step 2: Convert to fraction form
   2,288.24/3,157.76 = 1,240.30/x
3. Step 3: Cross multiply
   2,288.24x = 3,157.76 × 1,240.30
4. Step 4: Simplify right side
   2,288.24x = 3,916,569.73
5. Step 5: Solve for x
   x = 3,916,569.73/2,288.24
6. Step 6: Final answer
   x = 1,711.61