Finding the Fourth Proportional to 9,279.56, 12,805.74 and 5,087.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.56 : 12,805.74 = 5,087.72 : x
2. Step 2: Convert to fraction form
   9,279.56/12,805.74 = 5,087.72/x
3. Step 3: Cross multiply
   9,279.56x = 12,805.74 × 5,087.72
4. Step 4: Simplify right side
   9,279.56x = 65,152,019.51
5. Step 5: Solve for x
   x = 65,152,019.51/9,279.56
6. Step 6: Final answer
   x = 7,021.02