Finding the Fourth Proportional to 9,279.21, 12,805.29 and 5,087.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.21 : 12,805.29 = 5,087.46 : x
2. Step 2: Convert to fraction form
   9,279.21/12,805.29 = 5,087.46/x
3. Step 3: Cross multiply
   9,279.21x = 12,805.29 × 5,087.46
4. Step 4: Simplify right side
   9,279.21x = 65,146,400.66
5. Step 5: Solve for x
   x = 65,146,400.66/9,279.21
6. Step 6: Final answer
   x = 7,020.68