Finding the Fourth Proportional to 9,279.72, 12,806.18 and 5,087.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.72 : 12,806.18 = 5,087.92 : x
2. Step 2: Convert to fraction form
   9,279.72/12,806.18 = 5,087.92/x
3. Step 3: Cross multiply
   9,279.72x = 12,806.18 × 5,087.92
4. Step 4: Simplify right side
   9,279.72x = 65,156,819.35
5. Step 5: Solve for x
   x = 65,156,819.35/9,279.72
6. Step 6: Final answer
   x = 7,021.42