Finding the Fourth Proportional to 2,305.76, 3,181.86 and 1,257.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,305.76 : 3,181.86 = 1,257.83 : x
2. Step 2: Convert to fraction form
   2,305.76/3,181.86 = 1,257.83/x
3. Step 3: Cross multiply
   2,305.76x = 3,181.86 × 1,257.83
4. Step 4: Simplify right side
   2,305.76x = 4,002,238.96
5. Step 5: Solve for x
   x = 4,002,238.96/2,305.76
6. Step 6: Final answer
   x = 1,735.76