Finding the Fourth Proportional to 2,142.35, 2,955.49 and 1,257.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.35 : 2,955.49 = 1,257.83 : x
2. Step 2: Convert to fraction form
   2,142.35/2,955.49 = 1,257.83/x
3. Step 3: Cross multiply
   2,142.35x = 2,955.49 × 1,257.83
4. Step 4: Simplify right side
   2,142.35x = 3,717,497.15
5. Step 5: Solve for x
   x = 3,717,497.15/2,142.35
6. Step 6: Final answer
   x = 1,735.24