Finding the Fourth Proportional to 2,139.73, 2,952.70 and 1,255.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.73 : 2,952.70 = 1,255.47 : x
2. Step 2: Convert to fraction form
   2,139.73/2,952.70 = 1,255.47/x
3. Step 3: Cross multiply
   2,139.73x = 2,952.70 × 1,255.47
4. Step 4: Simplify right side
   2,139.73x = 3,707,026.27
5. Step 5: Solve for x
   x = 3,707,026.27/2,139.73
6. Step 6: Final answer
   x = 1,732.47