Finding the Fourth Proportional to 10,819.78, 16,231.53 and 3,424.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,819.78 : 16,231.53 = 3,424.12 : x
2. Step 2: Convert to fraction form
   10,819.78/16,231.53 = 3,424.12/x
3. Step 3: Cross multiply
   10,819.78x = 16,231.53 × 3,424.12
4. Step 4: Simplify right side
   10,819.78x = 55,578,706.50
5. Step 5: Solve for x
   x = 55,578,706.50/10,819.78
6. Step 6: Final answer
   x = 5,136.77