Finding the Fourth Proportional to 12,879.20, 17,770.89 and 7,572.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,879.20 : 17,770.89 = 7,572.08 : x
2. Step 2: Convert to fraction form
   12,879.20/17,770.89 = 7,572.08/x
3. Step 3: Cross multiply
   12,879.20x = 17,770.89 × 7,572.08
4. Step 4: Simplify right side
   12,879.20x = 134,562,673.57
5. Step 5: Solve for x
   x = 134,562,673.57/12,879.20
6. Step 6: Final answer
   x = 10,448.06