Finding the Fourth Proportional to 1,960.76, 2,940.20 and 1,139.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,960.76 : 2,940.20 = 1,139.27 : x
2. Step 2: Convert to fraction form
   1,960.76/2,940.20 = 1,139.27/x
3. Step 3: Cross multiply
   1,960.76x = 2,940.20 × 1,139.27
4. Step 4: Simplify right side
   1,960.76x = 3,349,687.58
5. Step 5: Solve for x
   x = 3,349,687.58/1,960.76
6. Step 6: Final answer
   x = 1,708.36