Finding the Fourth Proportional to 1,308.48, 1,806.04 and 810.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.48 : 1,806.04 = 810.82 : x
2. Step 2: Convert to fraction form
   1,308.48/1,806.04 = 810.82/x
3. Step 3: Cross multiply
   1,308.48x = 1,806.04 × 810.82
4. Step 4: Simplify right side
   1,308.48x = 1,464,373.35
5. Step 5: Solve for x
   x = 1,464,373.35/1,308.48
6. Step 6: Final answer
   x = 1,119.14