Finding the Fourth Proportional to 1,780.72, 2,456.25 and 1,183.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.72 : 2,456.25 = 1,183.20 : x
2. Step 2: Convert to fraction form
   1,780.72/2,456.25 = 1,183.20/x
3. Step 3: Cross multiply
   1,780.72x = 2,456.25 × 1,183.20
4. Step 4: Simplify right side
   1,780.72x = 2,906,235
5. Step 5: Solve for x
   x = 2,906,235/1,780.72
6. Step 6: Final answer
   x = 1,632.06