Finding the Fourth Proportional to 12,528.05, 17,280.39 and 8,057.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,528.05 : 17,280.39 = 8,057.46 : x
2. Step 2: Convert to fraction form
   12,528.05/17,280.39 = 8,057.46/x
3. Step 3: Cross multiply
   12,528.05x = 17,280.39 × 8,057.46
4. Step 4: Simplify right side
   12,528.05x = 139,236,010.92
5. Step 5: Solve for x
   x = 139,236,010.92/12,528.05
6. Step 6: Final answer
   x = 11,113.94