Finding the Fourth Proportional to 2,662.34, 3,993.33 and 813.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.34 : 3,993.33 = 813.29 : x
2. Step 2: Convert to fraction form
   2,662.34/3,993.33 = 813.29/x
3. Step 3: Cross multiply
   2,662.34x = 3,993.33 × 813.29
4. Step 4: Simplify right side
   2,662.34x = 3,247,715.39
5. Step 5: Solve for x
   x = 3,247,715.39/2,662.34
6. Step 6: Final answer
   x = 1,219.87