Finding the Fourth Proportional to 1,308.04, 1,805.42 and 810.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.04 : 1,805.42 = 810.38 : x
2. Step 2: Convert to fraction form
   1,308.04/1,805.42 = 810.38/x
3. Step 3: Cross multiply
   1,308.04x = 1,805.42 × 810.38
4. Step 4: Simplify right side
   1,308.04x = 1,463,076.26
5. Step 5: Solve for x
   x = 1,463,076.26/1,308.04
6. Step 6: Final answer
   x = 1,118.53