Finding the Fourth Proportional to 3,721.05, 5,579.94 and 1,255.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,721.05 : 5,579.94 = 1,255.20 : x
2. Step 2: Convert to fraction form
   3,721.05/5,579.94 = 1,255.20/x
3. Step 3: Cross multiply
   3,721.05x = 5,579.94 × 1,255.20
4. Step 4: Simplify right side
   3,721.05x = 7,003,940.69
5. Step 5: Solve for x
   x = 7,003,940.69/3,721.05
6. Step 6: Final answer
   x = 1,882.25