Finding the Fourth Proportional to 12,528.30, 17,280.73 and 8,057.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,528.30 : 17,280.73 = 8,057.71 : x
2. Step 2: Convert to fraction form
   12,528.30/17,280.73 = 8,057.71/x
3. Step 3: Cross multiply
   12,528.30x = 17,280.73 × 8,057.71
4. Step 4: Simplify right side
   12,528.30x = 139,243,047.58
5. Step 5: Solve for x
   x = 139,243,047.58/12,528.30
6. Step 6: Final answer
   x = 11,114.28