Finding the Fourth Proportional to 21,897.36, 30,222.18 and 12,944.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,897.36 : 30,222.18 = 12,944.16 : x
2. Step 2: Convert to fraction form
   21,897.36/30,222.18 = 12,944.16/x
3. Step 3: Cross multiply
   21,897.36x = 30,222.18 × 12,944.16
4. Step 4: Simplify right side
   21,897.36x = 391,200,733.47
5. Step 5: Solve for x
   x = 391,200,733.47/21,897.36
6. Step 6: Final answer
   x = 17,865.20