Finding the Fourth Proportional to 12,744.12, 17,581.58 and 9,199.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,744.12 : 17,581.58 = 9,199.48 : x
2. Step 2: Convert to fraction form
   12,744.12/17,581.58 = 9,199.48/x
3. Step 3: Cross multiply
   12,744.12x = 17,581.58 × 9,199.48
4. Step 4: Simplify right side
   12,744.12x = 161,741,393.58
5. Step 5: Solve for x
   x = 161,741,393.58/12,744.12
6. Step 6: Final answer
   x = 12,691.45