Finding the Fourth Proportional to 2,288.18, 3,157.69 and 1,240.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.18 : 3,157.69 = 1,240.25 : x
2. Step 2: Convert to fraction form
   2,288.18/3,157.69 = 1,240.25/x
3. Step 3: Cross multiply
   2,288.18x = 3,157.69 × 1,240.25
4. Step 4: Simplify right side
   2,288.18x = 3,916,308.46
5. Step 5: Solve for x
   x = 3,916,308.46/2,288.18
6. Step 6: Final answer
   x = 1,711.54