Finding the Fourth Proportional to 12,112.43, 18,161.33 and 7,898.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,112.43 : 18,161.33 = 7,898.81 : x
2. Step 2: Convert to fraction form
   12,112.43/18,161.33 = 7,898.81/x
3. Step 3: Cross multiply
   12,112.43x = 18,161.33 × 7,898.81
4. Step 4: Simplify right side
   12,112.43x = 143,452,855.52
5. Step 5: Solve for x
   x = 143,452,855.52/12,112.43
6. Step 6: Final answer
   x = 11,843.44