Finding the Fourth Proportional to 12,109.29, 18,161.66 and 3,788.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,109.29 : 18,161.66 = 3,788.06 : x
2. Step 2: Convert to fraction form
   12,109.29/18,161.66 = 3,788.06/x
3. Step 3: Cross multiply
   12,109.29x = 18,161.66 × 3,788.06
4. Step 4: Simplify right side
   12,109.29x = 68,797,457.78
5. Step 5: Solve for x
   x = 68,797,457.78/12,109.29
6. Step 6: Final answer
   x = 5,681.38