Finding the Fourth Proportional to 12,588.96, 17,369.36 and 8,109.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,588.96 : 17,369.36 = 8,109.04 : x
2. Step 2: Convert to fraction form
   12,588.96/17,369.36 = 8,109.04/x
3. Step 3: Cross multiply
   12,588.96x = 17,369.36 × 8,109.04
4. Step 4: Simplify right side
   12,588.96x = 140,848,835.01
5. Step 5: Solve for x
   x = 140,848,835.01/12,588.96
6. Step 6: Final answer
   x = 11,188.28