Finding the Fourth Proportional to 12,456.79, 17,264.56 and 12,223.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456.79 : 17,264.56 = 12,223.51 : x
2. Step 2: Convert to fraction form
   12,456.79/17,264.56 = 12,223.51/x
3. Step 3: Cross multiply
   12,456.79x = 17,264.56 × 12,223.51
4. Step 4: Simplify right side
   12,456.79x = 211,033,435.48
5. Step 5: Solve for x
   x = 211,033,435.48/12,456.79
6. Step 6: Final answer
   x = 16,941.24