Finding the Fourth Proportional to 2,255.56, 3,112.65 and 1,247.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.56 : 3,112.65 = 1,247.34 : x
2. Step 2: Convert to fraction form
   2,255.56/3,112.65 = 1,247.34/x
3. Step 3: Cross multiply
   2,255.56x = 3,112.65 × 1,247.34
4. Step 4: Simplify right side
   2,255.56x = 3,882,521.77
5. Step 5: Solve for x
   x = 3,882,521.77/2,255.56
6. Step 6: Final answer
   x = 1,721.31