Finding the Fourth Proportional to 9,258.22, 12,775.59 and 5,278.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,258.22 : 12,775.59 = 5,278.59 : x
2. Step 2: Convert to fraction form
   9,258.22/12,775.59 = 5,278.59/x
3. Step 3: Cross multiply
   9,258.22x = 12,775.59 × 5,278.59
4. Step 4: Simplify right side
   9,258.22x = 67,437,101.62
5. Step 5: Solve for x
   x = 67,437,101.62/9,258.22
6. Step 6: Final answer
   x = 7,284.02