Finding the Fourth Proportional to 1,308.22, 1,804.89 and 865.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.22 : 1,804.89 = 865.69 : x
2. Step 2: Convert to fraction form
   1,308.22/1,804.89 = 865.69/x
3. Step 3: Cross multiply
   1,308.22x = 1,804.89 × 865.69
4. Step 4: Simplify right side
   1,308.22x = 1,562,475.22
5. Step 5: Solve for x
   x = 1,562,475.22/1,308.22
6. Step 6: Final answer
   x = 1,194.35