Finding the Fourth Proportional to 12,111.23, 18,113.72 and 10,786.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,111.23 : 18,113.72 = 10,786.37 : x
2. Step 2: Convert to fraction form
   12,111.23/18,113.72 = 10,786.37/x
3. Step 3: Cross multiply
   12,111.23x = 18,113.72 × 10,786.37
4. Step 4: Simplify right side
   12,111.23x = 195,381,286.00
5. Step 5: Solve for x
   x = 195,381,286.00/12,111.23
6. Step 6: Final answer
   x = 16,132.24