Finding the Fourth Proportional to 12,389.50, 18,584.82 and 3,505.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,389.50 : 18,584.82 = 3,505.50 : x
2. Step 2: Convert to fraction form
   12,389.50/18,584.82 = 3,505.50/x
3. Step 3: Cross multiply
   12,389.50x = 18,584.82 × 3,505.50
4. Step 4: Simplify right side
   12,389.50x = 65,149,099.66
5. Step 5: Solve for x
   x = 65,149,099.66/12,389.50
6. Step 6: Final answer
   x = 5,258.41