Finding the Fourth Proportional to 9,279.12, 12,805.20 and 5,087.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.12 : 12,805.20 = 5,087.46 : x
2. Step 2: Convert to fraction form
   9,279.12/12,805.20 = 5,087.46/x
3. Step 3: Cross multiply
   9,279.12x = 12,805.20 × 5,087.46
4. Step 4: Simplify right side
   9,279.12x = 65,145,942.79
5. Step 5: Solve for x
   x = 65,145,942.79/9,279.12
6. Step 6: Final answer
   x = 7,020.70