Finding the Fourth Proportional to 12,429.57, 18,650.84 and 5,039.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.57 : 18,650.84 = 5,039.49 : x
2. Step 2: Convert to fraction form
   12,429.57/18,650.84 = 5,039.49/x
3. Step 3: Cross multiply
   12,429.57x = 18,650.84 × 5,039.49
4. Step 4: Simplify right side
   12,429.57x = 93,990,721.67
5. Step 5: Solve for x
   x = 93,990,721.67/12,429.57
6. Step 6: Final answer
   x = 7,561.86