Finding the Fourth Proportional to 16,140.39, 24,217.40 and 12,449.82

Step by Step Solution

1. Step 1: Write the proportion equation
   16,140.39 : 24,217.40 = 12,449.82 : x
2. Step 2: Convert to fraction form
   16,140.39/24,217.40 = 12,449.82/x
3. Step 3: Cross multiply
   16,140.39x = 24,217.40 × 12,449.82
4. Step 4: Simplify right side
   16,140.39x = 301,502,270.87
5. Step 5: Solve for x
   x = 301,502,270.87/16,140.39
6. Step 6: Final answer
   x = 18,679.99