Finding the Fourth Proportional to 21,664.63, 29,897.15 and 12,233.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,664.63 : 29,897.15 = 12,233.20 : x
2. Step 2: Convert to fraction form
   21,664.63/29,897.15 = 12,233.20/x
3. Step 3: Cross multiply
   21,664.63x = 29,897.15 × 12,233.20
4. Step 4: Simplify right side
   21,664.63x = 365,737,665.89
5. Step 5: Solve for x
   x = 365,737,665.89/21,664.63
6. Step 6: Final answer
   x = 16,881.79