Finding the Fourth Proportional to 2,288.12, 3,157.56 and 1,240.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.12 : 3,157.56 = 1,240.18 : x
2. Step 2: Convert to fraction form
   2,288.12/3,157.56 = 1,240.18/x
3. Step 3: Cross multiply
   2,288.12x = 3,157.56 × 1,240.18
4. Step 4: Simplify right side
   2,288.12x = 3,915,934.87
5. Step 5: Solve for x
   x = 3,915,934.87/2,288.12
6. Step 6: Final answer
   x = 1,711.42