Finding the Fourth Proportional to 21,456.45, 29,608.28 and 12,023.19

Step by Step Solution

1. Step 1: Write the proportion equation
   21,456.45 : 29,608.28 = 12,023.19 : x
2. Step 2: Convert to fraction form
   21,456.45/29,608.28 = 12,023.19/x
3. Step 3: Cross multiply
   21,456.45x = 29,608.28 × 12,023.19
4. Step 4: Simplify right side
   21,456.45x = 355,985,976.01
5. Step 5: Solve for x
   x = 355,985,976.01/21,456.45
6. Step 6: Final answer
   x = 16,591.09