Finding the Fourth Proportional to 1,258.25, 1,738.22 and 928.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.25 : 1,738.22 = 928.50 : x
2. Step 2: Convert to fraction form
   1,258.25/1,738.22 = 928.50/x
3. Step 3: Cross multiply
   1,258.25x = 1,738.22 × 928.50
4. Step 4: Simplify right side
   1,258.25x = 1,613,931.33
5. Step 5: Solve for x
   x = 1,613,931.33/1,258.25
6. Step 6: Final answer
   x = 1,282.68