Finding the Fourth Proportional to 18,151.33, 25,057.25 and 12,111.61

Step by Step Solution

1. Step 1: Write the proportion equation
   18,151.33 : 25,057.25 = 12,111.61 : x
2. Step 2: Convert to fraction form
   18,151.33/25,057.25 = 12,111.61/x
3. Step 3: Cross multiply
   18,151.33x = 25,057.25 × 12,111.61
4. Step 4: Simplify right side
   18,151.33x = 303,483,639.67
5. Step 5: Solve for x
   x = 303,483,639.67/18,151.33
6. Step 6: Final answer
   x = 16,719.64