Finding the Fourth Proportional to 11,384.56, 17,059.56 and 8,449.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,384.56 : 17,059.56 = 8,449.12 : x
2. Step 2: Convert to fraction form
   11,384.56/17,059.56 = 8,449.12/x
3. Step 3: Cross multiply
   11,384.56x = 17,059.56 × 8,449.12
4. Step 4: Simplify right side
   11,384.56x = 144,138,269.59
5. Step 5: Solve for x
   x = 144,138,269.59/11,384.56
6. Step 6: Final answer
   x = 12,660.86