Finding the Fourth Proportional to 9,279.89, 12,806.13 and 5,300.97

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.89 : 12,806.13 = 5,300.97 : x
2. Step 2: Convert to fraction form
   9,279.89/12,806.13 = 5,300.97/x
3. Step 3: Cross multiply
   9,279.89x = 12,806.13 × 5,300.97
4. Step 4: Simplify right side
   9,279.89x = 67,884,910.95
5. Step 5: Solve for x
   x = 67,884,910.95/9,279.89
6. Step 6: Final answer
   x = 7,315.27