Finding the Fourth Proportional to 21,796.18, 30,081.45 and 12,367.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,796.18 : 30,081.45 = 12,367.78 : x
2. Step 2: Convert to fraction form
   21,796.18/30,081.45 = 12,367.78/x
3. Step 3: Cross multiply
   21,796.18x = 30,081.45 × 12,367.78
4. Step 4: Simplify right side
   21,796.18x = 372,040,755.68
5. Step 5: Solve for x
   x = 372,040,755.68/21,796.18
6. Step 6: Final answer
   x = 17,069.08