Finding the Fourth Proportional to 12,628.39, 17,433.04 and 8,996.77

Step by Step Solution

1. Step 1: Write the proportion equation
   12,628.39 : 17,433.04 = 8,996.77 : x
2. Step 2: Convert to fraction form
   12,628.39/17,433.04 = 8,996.77/x
3. Step 3: Cross multiply
   12,628.39x = 17,433.04 × 8,996.77
4. Step 4: Simplify right side
   12,628.39x = 156,841,057.96
5. Step 5: Solve for x
   x = 156,841,057.96/12,628.39
6. Step 6: Final answer
   x = 12,419.72