Finding the Fourth Proportional to 2,255.48, 3,112.53 and 1,247.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.48 : 3,112.53 = 1,247.25 : x
2. Step 2: Convert to fraction form
   2,255.48/3,112.53 = 1,247.25/x
3. Step 3: Cross multiply
   2,255.48x = 3,112.53 × 1,247.25
4. Step 4: Simplify right side
   2,255.48x = 3,882,103.37
5. Step 5: Solve for x
   x = 3,882,103.37/2,255.48
6. Step 6: Final answer
   x = 1,721.19