Finding the Fourth Proportional to 21,819.98, 30,110.43 and 12,260.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,819.98 : 30,110.43 = 12,260.25 : x
2. Step 2: Convert to fraction form
   21,819.98/30,110.43 = 12,260.25/x
3. Step 3: Cross multiply
   21,819.98x = 30,110.43 × 12,260.25
4. Step 4: Simplify right side
   21,819.98x = 369,161,445.38
5. Step 5: Solve for x
   x = 369,161,445.38/21,819.98
6. Step 6: Final answer
   x = 16,918.50