Finding the Fourth Proportional to 21,819.38, 30,110.94 and 12,388.14

Step by Step Solution

1. Step 1: Write the proportion equation
   21,819.38 : 30,110.94 = 12,388.14 : x
2. Step 2: Convert to fraction form
   21,819.38/30,110.94 = 12,388.14/x
3. Step 3: Cross multiply
   21,819.38x = 30,110.94 × 12,388.14
4. Step 4: Simplify right side
   21,819.38x = 373,018,540.25
5. Step 5: Solve for x
   x = 373,018,540.25/21,819.38
6. Step 6: Final answer
   x = 17,095.75