Finding the Fourth Proportional to 21,961.89, 30,299.54 and 12,524.99

Step by Step Solution

1. Step 1: Write the proportion equation
   21,961.89 : 30,299.54 = 12,524.99 : x
2. Step 2: Convert to fraction form
   21,961.89/30,299.54 = 12,524.99/x
3. Step 3: Cross multiply
   21,961.89x = 30,299.54 × 12,524.99
4. Step 4: Simplify right side
   21,961.89x = 379,501,221.38
5. Step 5: Solve for x
   x = 379,501,221.38/21,961.89
6. Step 6: Final answer
   x = 17,279.99