Finding the Fourth Proportional to 13,309.92, 19,967.31 and 5,519.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,309.92 : 19,967.31 = 5,519.34 : x
2. Step 2: Convert to fraction form
   13,309.92/19,967.31 = 5,519.34/x
3. Step 3: Cross multiply
   13,309.92x = 19,967.31 × 5,519.34
4. Step 4: Simplify right side
   13,309.92x = 110,206,372.78
5. Step 5: Solve for x
   x = 110,206,372.78/13,309.92
6. Step 6: Final answer
   x = 8,280.02