Finding the Fourth Proportional to 9,258.89, 12,776.94 and 5,281.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,258.89 : 12,776.94 = 5,281.28 : x
2. Step 2: Convert to fraction form
   9,258.89/12,776.94 = 5,281.28/x
3. Step 3: Cross multiply
   9,258.89x = 12,776.94 × 5,281.28
4. Step 4: Simplify right side
   9,258.89x = 67,478,533.80
5. Step 5: Solve for x
   x = 67,478,533.80/9,258.89
6. Step 6: Final answer
   x = 7,287.98