Finding the Fourth Proportional to 9,279.18, 12,805.29 and 5,087.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.18 : 12,805.29 = 5,087.43 : x
2. Step 2: Convert to fraction form
   9,279.18/12,805.29 = 5,087.43/x
3. Step 3: Cross multiply
   9,279.18x = 12,805.29 × 5,087.43
4. Step 4: Simplify right side
   9,279.18x = 65,146,016.50
5. Step 5: Solve for x
   x = 65,146,016.50/9,279.18
6. Step 6: Final answer
   x = 7,020.67