Finding the Fourth Proportional to 2,139.48, 2,952.06 and 1,255.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.48 : 2,952.06 = 1,255.56 : x
2. Step 2: Convert to fraction form
   2,139.48/2,952.06 = 1,255.56/x
3. Step 3: Cross multiply
   2,139.48x = 2,952.06 × 1,255.56
4. Step 4: Simplify right side
   2,139.48x = 3,706,488.45
5. Step 5: Solve for x
   x = 3,706,488.45/2,139.48
6. Step 6: Final answer
   x = 1,732.42