Finding the Fourth Proportional to 2,672.43, 4,009.17 and 823.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,672.43 : 4,009.17 = 823.23 : x
2. Step 2: Convert to fraction form
   2,672.43/4,009.17 = 823.23/x
3. Step 3: Cross multiply
   2,672.43x = 4,009.17 × 823.23
4. Step 4: Simplify right side
   2,672.43x = 3,300,469.02
5. Step 5: Solve for x
   x = 3,300,469.02/2,672.43
6. Step 6: Final answer
   x = 1,235.01