Finding the Fourth Proportional to 9,279.36, 12,805.58 and 5,087.64

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.36 : 12,805.58 = 5,087.64 : x
2. Step 2: Convert to fraction form
   9,279.36/12,805.58 = 5,087.64/x
3. Step 3: Cross multiply
   9,279.36x = 12,805.58 × 5,087.64
4. Step 4: Simplify right side
   9,279.36x = 65,150,181.03
5. Step 5: Solve for x
   x = 65,150,181.03/9,279.36
6. Step 6: Final answer
   x = 7,020.98