Finding the Fourth Proportional to 2,291.24, 3,161.71 and 1,296.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.24 : 3,161.71 = 1,296.61 : x
2. Step 2: Convert to fraction form
   2,291.24/3,161.71 = 1,296.61/x
3. Step 3: Cross multiply
   2,291.24x = 3,161.71 × 1,296.61
4. Step 4: Simplify right side
   2,291.24x = 4,099,494.87
5. Step 5: Solve for x
   x = 4,099,494.87/2,291.24
6. Step 6: Final answer
   x = 1,789.21