Finding the Fourth Proportional to 21,663.88, 29,896.15 and 12,233.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,663.88 : 29,896.15 = 12,233.05 : x
2. Step 2: Convert to fraction form
   21,663.88/29,896.15 = 12,233.05/x
3. Step 3: Cross multiply
   21,663.88x = 29,896.15 × 12,233.05
4. Step 4: Simplify right side
   21,663.88x = 365,721,097.76
5. Step 5: Solve for x
   x = 365,721,097.76/21,663.88
6. Step 6: Final answer
   x = 16,881.61