Finding the Fourth Proportional to 1,333.62, 1,840.38 and 809.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.62 : 1,840.38 = 809.28 : x
2. Step 2: Convert to fraction form
   1,333.62/1,840.38 = 809.28/x
3. Step 3: Cross multiply
   1,333.62x = 1,840.38 × 809.28
4. Step 4: Simplify right side
   1,333.62x = 1,489,382.73
5. Step 5: Solve for x
   x = 1,489,382.73/1,333.62
6. Step 6: Final answer
   x = 1,116.80