Finding the Fourth Proportional to 2,403.56, 3,604.86 and 671.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,403.56 : 3,604.86 = 671.72 : x
2. Step 2: Convert to fraction form
   2,403.56/3,604.86 = 671.72/x
3. Step 3: Cross multiply
   2,403.56x = 3,604.86 × 671.72
4. Step 4: Simplify right side
   2,403.56x = 2,421,456.56
5. Step 5: Solve for x
   x = 2,421,456.56/2,403.56
6. Step 6: Final answer
   x = 1,007.45