Finding the Fourth Proportional to 21,936.15, 30,272.60 and 12,375.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,936.15 : 30,272.60 = 12,375.86 : x
2. Step 2: Convert to fraction form
   21,936.15/30,272.60 = 12,375.86/x
3. Step 3: Cross multiply
   21,936.15x = 30,272.60 × 12,375.86
4. Step 4: Simplify right side
   21,936.15x = 374,649,339.01
5. Step 5: Solve for x
   x = 374,649,339.01/21,936.15
6. Step 6: Final answer
   x = 17,079.08