Finding the Fourth Proportional to 2,291.91, 3,162.61 and 1,296.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.91 : 3,162.61 = 1,296.99 : x
2. Step 2: Convert to fraction form
   2,291.91/3,162.61 = 1,296.99/x
3. Step 3: Cross multiply
   2,291.91x = 3,162.61 × 1,296.99
4. Step 4: Simplify right side
   2,291.91x = 4,101,880.81
5. Step 5: Solve for x
   x = 4,101,880.81/2,291.91
6. Step 6: Final answer
   x = 1,789.72