Finding the Fourth Proportional to 21,899.34, 30,219.26 and 12,336.17

Step by Step Solution

1. Step 1: Write the proportion equation
   21,899.34 : 30,219.26 = 12,336.17 : x
2. Step 2: Convert to fraction form
   21,899.34/30,219.26 = 12,336.17/x
3. Step 3: Cross multiply
   21,899.34x = 30,219.26 × 12,336.17
4. Step 4: Simplify right side
   21,899.34x = 372,789,715.86
5. Step 5: Solve for x
   x = 372,789,715.86/21,899.34
6. Step 6: Final answer
   x = 17,022.87