Finding the Fourth Proportional to 2,662.89, 3,994.31 and 814.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.89 : 3,994.31 = 814.00 : x
2. Step 2: Convert to fraction form
   2,662.89/3,994.31 = 814.00/x
3. Step 3: Cross multiply
   2,662.89x = 3,994.31 × 814.00
4. Step 4: Simplify right side
   2,662.89x = 3,251,348.37
5. Step 5: Solve for x
   x = 3,251,348.37/2,662.89
6. Step 6: Final answer
   x = 1,220.99