Finding the Fourth Proportional to 9,279.63, 12,805.76 and 5,087.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.63 : 12,805.76 = 5,087.88 : x
2. Step 2: Convert to fraction form
   9,279.63/12,805.76 = 5,087.88/x
3. Step 3: Cross multiply
   9,279.63x = 12,805.76 × 5,087.88
4. Step 4: Simplify right side
   9,279.63x = 65,154,182.91
5. Step 5: Solve for x
   x = 65,154,182.91/9,279.63
6. Step 6: Final answer
   x = 7,021.20