Finding the Fourth Proportional to 12,879.15, 17,776.05 and 7,577.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,879.15 : 17,776.05 = 7,577.04 : x
2. Step 2: Convert to fraction form
   12,879.15/17,776.05 = 7,577.04/x
3. Step 3: Cross multiply
   12,879.15x = 17,776.05 × 7,577.04
4. Step 4: Simplify right side
   12,879.15x = 134,689,841.89
5. Step 5: Solve for x
   x = 134,689,841.89/12,879.15
6. Step 6: Final answer
   x = 10,457.98