Finding the Fourth Proportional to 2,662.91, 3,994.89 and 814.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.91 : 3,994.89 = 814.29 : x
2. Step 2: Convert to fraction form
   2,662.91/3,994.89 = 814.29/x
3. Step 3: Cross multiply
   2,662.91x = 3,994.89 × 814.29
4. Step 4: Simplify right side
   2,662.91x = 3,252,980.94
5. Step 5: Solve for x
   x = 3,252,980.94/2,662.91
6. Step 6: Final answer
   x = 1,221.59