Finding the Fourth Proportional to 9,279.05, 12,804.89 and 5,299.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.05 : 12,804.89 = 5,299.79 : x
2. Step 2: Convert to fraction form
   9,279.05/12,804.89 = 5,299.79/x
3. Step 3: Cross multiply
   9,279.05x = 12,804.89 × 5,299.79
4. Step 4: Simplify right side
   9,279.05x = 67,863,137.45
5. Step 5: Solve for x
   x = 67,863,137.45/9,279.05
6. Step 6: Final answer
   x = 7,313.59