Finding the Fourth Proportional to 12,404.24, 18,606.54 and 3,639.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,404.24 : 18,606.54 = 3,639.34 : x
2. Step 2: Convert to fraction form
   12,404.24/18,606.54 = 3,639.34/x
3. Step 3: Cross multiply
   12,404.24x = 18,606.54 × 3,639.34
4. Step 4: Simplify right side
   12,404.24x = 67,715,414.05
5. Step 5: Solve for x
   x = 67,715,414.05/12,404.24
6. Step 6: Final answer
   x = 5,459.05