Finding the Fourth Proportional to 9,279.11, 12,805.15 and 5,087.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.11 : 12,805.15 = 5,087.39 : x
2. Step 2: Convert to fraction form
   9,279.11/12,805.15 = 5,087.39/x
3. Step 3: Cross multiply
   9,279.11x = 12,805.15 × 5,087.39
4. Step 4: Simplify right side
   9,279.11x = 65,144,792.06
5. Step 5: Solve for x
   x = 65,144,792.06/9,279.11
6. Step 6: Final answer
   x = 7,020.59