Finding the Fourth Proportional to 9,258.55, 12,776.59 and 5,279.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,258.55 : 12,776.59 = 5,279.29 : x
2. Step 2: Convert to fraction form
   9,258.55/12,776.59 = 5,279.29/x
3. Step 3: Cross multiply
   9,258.55x = 12,776.59 × 5,279.29
4. Step 4: Simplify right side
   9,258.55x = 67,451,323.82
5. Step 5: Solve for x
   x = 67,451,323.82/9,258.55
6. Step 6: Final answer
   x = 7,285.30