Finding the Fourth Proportional to 9,108.72, 12,569.00 and 5,129.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,108.72 : 12,569.00 = 5,129.73 : x
2. Step 2: Convert to fraction form
   9,108.72/12,569.00 = 5,129.73/x
3. Step 3: Cross multiply
   9,108.72x = 12,569.00 × 5,129.73
4. Step 4: Simplify right side
   9,108.72x = 64,475,550.72
5. Step 5: Solve for x
   x = 64,475,550.72/9,108.72
6. Step 6: Final answer
   x = 7,078.44