Finding the Fourth Proportional to 1,308.33, 1,954.59 and 842.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.33 : 1,954.59 = 842.31 : x
2. Step 2: Convert to fraction form
   1,308.33/1,954.59 = 842.31/x
3. Step 3: Cross multiply
   1,308.33x = 1,954.59 × 842.31
4. Step 4: Simplify right side
   1,308.33x = 1,646,367.54
5. Step 5: Solve for x
   x = 1,646,367.54/1,308.33
6. Step 6: Final answer
   x = 1,258.37