Finding the Fourth Proportional to 3,721.56, 5,580.72 and 1,255.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,721.56 : 5,580.72 = 1,255.72 : x
2. Step 2: Convert to fraction form
   3,721.56/5,580.72 = 1,255.72/x
3. Step 3: Cross multiply
   3,721.56x = 5,580.72 × 1,255.72
4. Step 4: Simplify right side
   3,721.56x = 7,007,807.77
5. Step 5: Solve for x
   x = 7,007,807.77/3,721.56
6. Step 6: Final answer
   x = 1,883.03