Finding the Fourth Proportional to 9,258.78, 12,777.12 and 5,067.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,258.78 : 12,777.12 = 5,067.12 : x
2. Step 2: Convert to fraction form
   9,258.78/12,777.12 = 5,067.12/x
3. Step 3: Cross multiply
   9,258.78x = 12,777.12 × 5,067.12
4. Step 4: Simplify right side
   9,258.78x = 64,743,200.29
5. Step 5: Solve for x
   x = 64,743,200.29/9,258.78
6. Step 6: Final answer
   x = 6,992.63