Finding the Fourth Proportional to 12,399.42, 17,111.32 and 6,734.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,399.42 : 17,111.32 = 6,734.22 : x
2. Step 2: Convert to fraction form
   12,399.42/17,111.32 = 6,734.22/x
3. Step 3: Cross multiply
   12,399.42x = 17,111.32 × 6,734.22
4. Step 4: Simplify right side
   12,399.42x = 115,231,393.37
5. Step 5: Solve for x
   x = 115,231,393.37/12,399.42
6. Step 6: Final answer
   x = 9,293.29