Finding the Fourth Proportional to 2,287.99, 3,429.90 and 826.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.99 : 3,429.90 = 826.09 : x
2. Step 2: Convert to fraction form
   2,287.99/3,429.90 = 826.09/x
3. Step 3: Cross multiply
   2,287.99x = 3,429.90 × 826.09
4. Step 4: Simplify right side
   2,287.99x = 2,833,406.09
5. Step 5: Solve for x
   x = 2,833,406.09/2,287.99
6. Step 6: Final answer
   x = 1,238.38