Finding the Fourth Proportional to 12,428.82, 18,636.79 and 3,662.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,428.82 : 18,636.79 = 3,662.58 : x
2. Step 2: Convert to fraction form
   12,428.82/18,636.79 = 3,662.58/x
3. Step 3: Cross multiply
   12,428.82x = 18,636.79 × 3,662.58
4. Step 4: Simplify right side
   12,428.82x = 68,258,734.32
5. Step 5: Solve for x
   x = 68,258,734.32/12,428.82
6. Step 6: Final answer
   x = 5,491.97