Finding the Fourth Proportional to 12,109.61, 18,164.46 and 3,676.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,109.61 : 18,164.46 = 3,676.18 : x
2. Step 2: Convert to fraction form
   12,109.61/18,164.46 = 3,676.18/x
3. Step 3: Cross multiply
   12,109.61x = 18,164.46 × 3,676.18
4. Step 4: Simplify right side
   12,109.61x = 66,775,824.56
5. Step 5: Solve for x
   x = 66,775,824.56/12,109.61
6. Step 6: Final answer
   x = 5,514.29