Finding the Fourth Proportional to 21,826.26, 30,118.64 and 12,393

Step by Step Solution

1. Step 1: Write the proportion equation
   21,826.26 : 30,118.64 = 12,393 : x
2. Step 2: Convert to fraction form
   21,826.26/30,118.64 = 12,393/x
3. Step 3: Cross multiply
   21,826.26x = 30,118.64 × 12,393
4. Step 4: Simplify right side
   21,826.26x = 373,260,243.56
5. Step 5: Solve for x
   x = 373,260,243.56/21,826.26
6. Step 6: Final answer
   x = 17,101.43