Finding the Fourth Proportional to 9,279.46, 12,804.25 and 5,299.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.46 : 12,804.25 = 5,299.72 : x
2. Step 2: Convert to fraction form
   9,279.46/12,804.25 = 5,299.72/x
3. Step 3: Cross multiply
   9,279.46x = 12,804.25 × 5,299.72
4. Step 4: Simplify right side
   9,279.46x = 67,858,939.81
5. Step 5: Solve for x
   x = 67,858,939.81/9,279.46
6. Step 6: Final answer
   x = 7,312.81