Finding the Fourth Proportional to 12,839.52, 17,697.36 and 8,589.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,839.52 : 17,697.36 = 8,589.05 : x
2. Step 2: Convert to fraction form
   12,839.52/17,697.36 = 8,589.05/x
3. Step 3: Cross multiply
   12,839.52x = 17,697.36 × 8,589.05
4. Step 4: Simplify right side
   12,839.52x = 152,003,520.00
5. Step 5: Solve for x
   x = 152,003,520.00/12,839.52
6. Step 6: Final answer
   x = 11,838.72