Finding the Fourth Proportional to 2,258.96, 3,390.15 and 961.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,258.96 : 3,390.15 = 961.34 : x
2. Step 2: Convert to fraction form
   2,258.96/3,390.15 = 961.34/x
3. Step 3: Cross multiply
   2,258.96x = 3,390.15 × 961.34
4. Step 4: Simplify right side
   2,258.96x = 3,259,086.80
5. Step 5: Solve for x
   x = 3,259,086.80/2,258.96
6. Step 6: Final answer
   x = 1,442.74