Finding the Fourth Proportional to 21,456.88, 29,608.32 and 12,026.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,456.88 : 29,608.32 = 12,026.32 : x
2. Step 2: Convert to fraction form
   21,456.88/29,608.32 = 12,026.32/x
3. Step 3: Cross multiply
   21,456.88x = 29,608.32 × 12,026.32
4. Step 4: Simplify right side
   21,456.88x = 356,079,130.98
5. Step 5: Solve for x
   x = 356,079,130.98/21,456.88
6. Step 6: Final answer
   x = 16,595.10