Finding the Fourth Proportional to 12,412.24, 18,618.48 and 3,647.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,412.24 : 18,618.48 = 3,647.30 : x
2. Step 2: Convert to fraction form
   12,412.24/18,618.48 = 3,647.30/x
3. Step 3: Cross multiply
   12,412.24x = 18,618.48 × 3,647.30
4. Step 4: Simplify right side
   12,412.24x = 67,907,182.10
5. Step 5: Solve for x
   x = 67,907,182.10/12,412.24
6. Step 6: Final answer
   x = 5,470.99