Finding the Fourth Proportional to 8,520.14, 12,743.76 and 7,105.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,520.14 : 12,743.76 = 7,105.88 : x
2. Step 2: Convert to fraction form
   8,520.14/12,743.76 = 7,105.88/x
3. Step 3: Cross multiply
   8,520.14x = 12,743.76 × 7,105.88
4. Step 4: Simplify right side
   8,520.14x = 90,555,629.31
5. Step 5: Solve for x
   x = 90,555,629.31/8,520.14
6. Step 6: Final answer
   x = 10,628.42