Finding the Fourth Proportional to 21,670.97, 29,910.89 and 12,242.57

Step by Step Solution

1. Step 1: Write the proportion equation
   21,670.97 : 29,910.89 = 12,242.57 : x
2. Step 2: Convert to fraction form
   21,670.97/29,910.89 = 12,242.57/x
3. Step 3: Cross multiply
   21,670.97x = 29,910.89 × 12,242.57
4. Step 4: Simplify right side
   21,670.97x = 366,186,103.37
5. Step 5: Solve for x
   x = 366,186,103.37/21,670.97
6. Step 6: Final answer
   x = 16,897.54