Finding the Fourth Proportional to 9,279.70, 12,806.16 and 5,087.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.70 : 12,806.16 = 5,087.92 : x
2. Step 2: Convert to fraction form
   9,279.70/12,806.16 = 5,087.92/x
3. Step 3: Cross multiply
   9,279.70x = 12,806.16 × 5,087.92
4. Step 4: Simplify right side
   9,279.70x = 65,156,717.59
5. Step 5: Solve for x
   x = 65,156,717.59/9,279.70
6. Step 6: Final answer
   x = 7,021.43