Finding the Fourth Proportional to 1,494.41, 2,239.86 and 671.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,494.41 : 2,239.86 = 671.72 : x
2. Step 2: Convert to fraction form
   1,494.41/2,239.86 = 671.72/x
3. Step 3: Cross multiply
   1,494.41x = 2,239.86 × 671.72
4. Step 4: Simplify right side
   1,494.41x = 1,504,558.76
5. Step 5: Solve for x
   x = 1,504,558.76/1,494.41
6. Step 6: Final answer
   x = 1,006.79