Finding the Fourth Proportional to 12,399.69, 17,111.72 and 6,734.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,399.69 : 17,111.72 = 6,734.45 : x
2. Step 2: Convert to fraction form
   12,399.69/17,111.72 = 6,734.45/x
3. Step 3: Cross multiply
   12,399.69x = 17,111.72 × 6,734.45
4. Step 4: Simplify right side
   12,399.69x = 115,238,082.37
5. Step 5: Solve for x
   x = 115,238,082.37/12,399.69
6. Step 6: Final answer
   x = 9,293.62