Finding the Fourth Proportional to 2,139.54, 2,951.73 and 1,255.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.54 : 2,951.73 = 1,255.02 : x
2. Step 2: Convert to fraction form
   2,139.54/2,951.73 = 1,255.02/x
3. Step 3: Cross multiply
   2,139.54x = 2,951.73 × 1,255.02
4. Step 4: Simplify right side
   2,139.54x = 3,704,480.18
5. Step 5: Solve for x
   x = 3,704,480.18/2,139.54
6. Step 6: Final answer
   x = 1,731.44