Finding the Fourth Proportional to 1,333.46, 1,839.90 and 809.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.46 : 1,839.90 = 809.20 : x
2. Step 2: Convert to fraction form
   1,333.46/1,839.90 = 809.20/x
3. Step 3: Cross multiply
   1,333.46x = 1,839.90 × 809.20
4. Step 4: Simplify right side
   1,333.46x = 1,488,847.08
5. Step 5: Solve for x
   x = 1,488,847.08/1,333.46
6. Step 6: Final answer
   x = 1,116.53