Finding the Fourth Proportional to 12,585.50, 18,880.41 and 3,821.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,585.50 : 18,880.41 = 3,821.30 : x
2. Step 2: Convert to fraction form
   12,585.50/18,880.41 = 3,821.30/x
3. Step 3: Cross multiply
   12,585.50x = 18,880.41 × 3,821.30
4. Step 4: Simplify right side
   12,585.50x = 72,147,710.73
5. Step 5: Solve for x
   x = 72,147,710.73/12,585.50
6. Step 6: Final answer
   x = 5,732.61