Finding the Fourth Proportional to 9,279.36, 12,806.28 and 5,301.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.36 : 12,806.28 = 5,301.72 : x
2. Step 2: Convert to fraction form
   9,279.36/12,806.28 = 5,301.72/x
3. Step 3: Cross multiply
   9,279.36x = 12,806.28 × 5,301.72
4. Step 4: Simplify right side
   9,279.36x = 67,895,310.80
5. Step 5: Solve for x
   x = 67,895,310.80/9,279.36
6. Step 6: Final answer
   x = 7,316.81