Finding the Fourth Proportional to 1,728.82, 2,591.79 and 803.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.82 : 2,591.79 = 803.89 : x
2. Step 2: Convert to fraction form
   1,728.82/2,591.79 = 803.89/x
3. Step 3: Cross multiply
   1,728.82x = 2,591.79 × 803.89
4. Step 4: Simplify right side
   1,728.82x = 2,083,514.06
5. Step 5: Solve for x
   x = 2,083,514.06/1,728.82
6. Step 6: Final answer
   x = 1,205.17