Finding the Fourth Proportional to 19,690.72, 27,168.37 and 12,626.71

Step by Step Solution

1. Step 1: Write the proportion equation
   19,690.72 : 27,168.37 = 12,626.71 : x
2. Step 2: Convert to fraction form
   19,690.72/27,168.37 = 12,626.71/x
3. Step 3: Cross multiply
   19,690.72x = 27,168.37 × 12,626.71
4. Step 4: Simplify right side
   19,690.72x = 343,047,029.68
5. Step 5: Solve for x
   x = 343,047,029.68/19,690.72
6. Step 6: Final answer
   x = 17,421.76