Finding the Fourth Proportional to 12,399.25, 17,111.10 and 6,810.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,399.25 : 17,111.10 = 6,810.25 : x
2. Step 2: Convert to fraction form
   12,399.25/17,111.10 = 6,810.25/x
3. Step 3: Cross multiply
   12,399.25x = 17,111.10 × 6,810.25
4. Step 4: Simplify right side
   12,399.25x = 116,530,868.78
5. Step 5: Solve for x
   x = 116,530,868.78/12,399.25
6. Step 6: Final answer
   x = 9,398.22