Finding the Fourth Proportional to 2,141.48, 2,955.33 and 1,257.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.48 : 2,955.33 = 1,257.28 : x
2. Step 2: Convert to fraction form
   2,141.48/2,955.33 = 1,257.28/x
3. Step 3: Cross multiply
   2,141.48x = 2,955.33 × 1,257.28
4. Step 4: Simplify right side
   2,141.48x = 3,715,669.91
5. Step 5: Solve for x
   x = 3,715,669.91/2,141.48
6. Step 6: Final answer
   x = 1,735.09