Finding the Fourth Proportional to 9,279.69, 12,806.60 and 5,245.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.69 : 12,806.60 = 5,245.12 : x
2. Step 2: Convert to fraction form
   9,279.69/12,806.60 = 5,245.12/x
3. Step 3: Cross multiply
   9,279.69x = 12,806.60 × 5,245.12
4. Step 4: Simplify right side
   9,279.69x = 67,172,153.79
5. Step 5: Solve for x
   x = 67,172,153.79/9,279.69
6. Step 6: Final answer
   x = 7,238.62