Finding the Fourth Proportional to 12,109.48, 18,154.41 and 3,785.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,109.48 : 18,154.41 = 3,785.21 : x
2. Step 2: Convert to fraction form
   12,109.48/18,154.41 = 3,785.21/x
3. Step 3: Cross multiply
   12,109.48x = 18,154.41 × 3,785.21
4. Step 4: Simplify right side
   12,109.48x = 68,718,208.89
5. Step 5: Solve for x
   x = 68,718,208.89/12,109.48
6. Step 6: Final answer
   x = 5,674.75