Finding the Fourth Proportional to 17,109, 25,642.44 and 12,151.80

Step by Step Solution

1. Step 1: Write the proportion equation
   17,109 : 25,642.44 = 12,151.80 : x
2. Step 2: Convert to fraction form
   17,109/25,642.44 = 12,151.80/x
3. Step 3: Cross multiply
   17,109x = 25,642.44 × 12,151.80
4. Step 4: Simplify right side
   17,109x = 311,601,802.39
5. Step 5: Solve for x
   x = 311,601,802.39/17,109
6. Step 6: Final answer
   x = 18,212.74