Finding the Fourth Proportional to 2,288.07, 3,430.05 and 826.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.07 : 3,430.05 = 826.89 : x
2. Step 2: Convert to fraction form
   2,288.07/3,430.05 = 826.89/x
3. Step 3: Cross multiply
   2,288.07x = 3,430.05 × 826.89
4. Step 4: Simplify right side
   2,288.07x = 2,836,274.04
5. Step 5: Solve for x
   x = 2,836,274.04/2,288.07
6. Step 6: Final answer
   x = 1,239.59