Finding the Fourth Proportional to 9,279.38, 12,807.59 and 7,258.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.38 : 12,807.59 = 7,258.79 : x
2. Step 2: Convert to fraction form
   9,279.38/12,807.59 = 7,258.79/x
3. Step 3: Cross multiply
   9,279.38x = 12,807.59 × 7,258.79
4. Step 4: Simplify right side
   9,279.38x = 92,967,505.88
5. Step 5: Solve for x
   x = 92,967,505.88/9,279.38
6. Step 6: Final answer
   x = 10,018.72