Finding the Fourth Proportional to 2,287.02, 3,431.06 and 826.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.02 : 3,431.06 = 826.18 : x
2. Step 2: Convert to fraction form
   2,287.02/3,431.06 = 826.18/x
3. Step 3: Cross multiply
   2,287.02x = 3,431.06 × 826.18
4. Step 4: Simplify right side
   2,287.02x = 2,834,656.70
5. Step 5: Solve for x
   x = 2,834,656.70/2,287.02
6. Step 6: Final answer
   x = 1,239.45