Finding the Fourth Proportional to 2,213.06, 3,320.17 and 826.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.06 : 3,320.17 = 826.41 : x
2. Step 2: Convert to fraction form
   2,213.06/3,320.17 = 826.41/x
3. Step 3: Cross multiply
   2,213.06x = 3,320.17 × 826.41
4. Step 4: Simplify right side
   2,213.06x = 2,743,821.69
5. Step 5: Solve for x
   x = 2,743,821.69/2,213.06
6. Step 6: Final answer
   x = 1,239.83