Finding the Fourth Proportional to 9,118.99, 12,582.42 and 5,579.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,118.99 : 12,582.42 = 5,579.69 : x
2. Step 2: Convert to fraction form
   9,118.99/12,582.42 = 5,579.69/x
3. Step 3: Cross multiply
   9,118.99x = 12,582.42 × 5,579.69
4. Step 4: Simplify right side
   9,118.99x = 70,206,003.05
5. Step 5: Solve for x
   x = 70,206,003.05/9,118.99
6. Step 6: Final answer
   x = 7,698.88