Finding the Fourth Proportional to 12,609.18, 17,397.27 and 8,131.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,609.18 : 17,397.27 = 8,131.32 : x
2. Step 2: Convert to fraction form
   12,609.18/17,397.27 = 8,131.32/x
3. Step 3: Cross multiply
   12,609.18x = 17,397.27 × 8,131.32
4. Step 4: Simplify right side
   12,609.18x = 141,462,769.50
5. Step 5: Solve for x
   x = 141,462,769.50/12,609.18
6. Step 6: Final answer
   x = 11,219.03