Finding the Fourth Proportional to 21,796.38, 30,078.80 and 12,365.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,796.38 : 30,078.80 = 12,365.02 : x
2. Step 2: Convert to fraction form
   21,796.38/30,078.80 = 12,365.02/x
3. Step 3: Cross multiply
   21,796.38x = 30,078.80 × 12,365.02
4. Step 4: Simplify right side
   21,796.38x = 371,924,963.58
5. Step 5: Solve for x
   x = 371,924,963.58/21,796.38
6. Step 6: Final answer
   x = 17,063.61