Finding the Fourth Proportional to 1,308.38, 1,805.82 and 811.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.38 : 1,805.82 = 811.24 : x
2. Step 2: Convert to fraction form
   1,308.38/1,805.82 = 811.24/x
3. Step 3: Cross multiply
   1,308.38x = 1,805.82 × 811.24
4. Step 4: Simplify right side
   1,308.38x = 1,464,953.42
5. Step 5: Solve for x
   x = 1,464,953.42/1,308.38
6. Step 6: Final answer
   x = 1,119.67