Finding the Fourth Proportional to 9,278.94, 12,805.23 and 5,087.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,278.94 : 12,805.23 = 5,087.58 : x
2. Step 2: Convert to fraction form
   9,278.94/12,805.23 = 5,087.58/x
3. Step 3: Cross multiply
   9,278.94x = 12,805.23 × 5,087.58
4. Step 4: Simplify right side
   9,278.94x = 65,147,632.04
5. Step 5: Solve for x
   x = 65,147,632.04/9,278.94
6. Step 6: Final answer
   x = 7,021.02