Finding the Fourth Proportional to 21,459, 29,611.02 and 12,026.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,459 : 29,611.02 = 12,026.20 : x
2. Step 2: Convert to fraction form
   21,459/29,611.02 = 12,026.20/x
3. Step 3: Cross multiply
   21,459x = 29,611.02 × 12,026.20
4. Step 4: Simplify right side
   21,459x = 356,108,048.72
5. Step 5: Solve for x
   x = 356,108,048.72/21,459
6. Step 6: Final answer
   x = 16,594.81