Finding the Fourth Proportional to 2,305.67, 3,181.83 and 1,257.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,305.67 : 3,181.83 = 1,257.80 : x
2. Step 2: Convert to fraction form
   2,305.67/3,181.83 = 1,257.80/x
3. Step 3: Cross multiply
   2,305.67x = 3,181.83 × 1,257.80
4. Step 4: Simplify right side
   2,305.67x = 4,002,105.77
5. Step 5: Solve for x
   x = 4,002,105.77/2,305.67
6. Step 6: Final answer
   x = 1,735.77