Finding the Fourth Proportional to 1,767.36, 2,651.69 and 671.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,767.36 : 2,651.69 = 671.72 : x
2. Step 2: Convert to fraction form
   1,767.36/2,651.69 = 671.72/x
3. Step 3: Cross multiply
   1,767.36x = 2,651.69 × 671.72
4. Step 4: Simplify right side
   1,767.36x = 1,781,176.59
5. Step 5: Solve for x
   x = 1,781,176.59/1,767.36
6. Step 6: Final answer
   x = 1,007.82