Finding the Fourth Proportional to 12,431.96, 18,649.51 and 3,667.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,431.96 : 18,649.51 = 3,667.05 : x
2. Step 2: Convert to fraction form
   12,431.96/18,649.51 = 3,667.05/x
3. Step 3: Cross multiply
   12,431.96x = 18,649.51 × 3,667.05
4. Step 4: Simplify right side
   12,431.96x = 68,388,676.48
5. Step 5: Solve for x
   x = 68,388,676.48/12,431.96
6. Step 6: Final answer
   x = 5,501.04