Finding the Fourth Proportional to 12,429.06, 18,644.18 and 3,664.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.06 : 18,644.18 = 3,664.05 : x
2. Step 2: Convert to fraction form
   12,429.06/18,644.18 = 3,664.05/x
3. Step 3: Cross multiply
   12,429.06x = 18,644.18 × 3,664.05
4. Step 4: Simplify right side
   12,429.06x = 68,313,189.41
5. Step 5: Solve for x
   x = 68,313,189.41/12,429.06
6. Step 6: Final answer
   x = 5,496.25