Finding the Fourth Proportional to 12,582.69, 18,878.49 and 7,040.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,582.69 : 18,878.49 = 7,040.81 : x
2. Step 2: Convert to fraction form
   12,582.69/18,878.49 = 7,040.81/x
3. Step 3: Cross multiply
   12,582.69x = 18,878.49 × 7,040.81
4. Step 4: Simplify right side
   12,582.69x = 132,919,766.78
5. Step 5: Solve for x
   x = 132,919,766.78/12,582.69
6. Step 6: Final answer
   x = 10,563.70