Finding the Fourth Proportional to 2,258.34, 3,386.69 and 959.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,258.34 : 3,386.69 = 959.91 : x
2. Step 2: Convert to fraction form
   2,258.34/3,386.69 = 959.91/x
3. Step 3: Cross multiply
   2,258.34x = 3,386.69 × 959.91
4. Step 4: Simplify right side
   2,258.34x = 3,250,917.60
5. Step 5: Solve for x
   x = 3,250,917.60/2,258.34
6. Step 6: Final answer
   x = 1,439.52