Finding the Fourth Proportional to 2,889.57, 4,333.83 and 809.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,889.57 : 4,333.83 = 809.06 : x
2. Step 2: Convert to fraction form
   2,889.57/4,333.83 = 809.06/x
3. Step 3: Cross multiply
   2,889.57x = 4,333.83 × 809.06
4. Step 4: Simplify right side
   2,889.57x = 3,506,306.83
5. Step 5: Solve for x
   x = 3,506,306.83/2,889.57
6. Step 6: Final answer
   x = 1,213.44