Finding the Fourth Proportional to 2,662.94, 3,993.06 and 813.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.94 : 3,993.06 = 813.62 : x
2. Step 2: Convert to fraction form
   2,662.94/3,993.06 = 813.62/x
3. Step 3: Cross multiply
   2,662.94x = 3,993.06 × 813.62
4. Step 4: Simplify right side
   2,662.94x = 3,248,833.48
5. Step 5: Solve for x
   x = 3,248,833.48/2,662.94
6. Step 6: Final answer
   x = 1,220.02