Finding the Fourth Proportional to 2,391.78, 3,589.04 and 1,296.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.78 : 3,589.04 = 1,296.76 : x
2. Step 2: Convert to fraction form
   2,391.78/3,589.04 = 1,296.76/x
3. Step 3: Cross multiply
   2,391.78x = 3,589.04 × 1,296.76
4. Step 4: Simplify right side
   2,391.78x = 4,654,123.51
5. Step 5: Solve for x
   x = 4,654,123.51/2,391.78
6. Step 6: Final answer
   x = 1,945.88