Finding the Fourth Proportional to 21,695.63, 29,942.17 and 13,198.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,695.63 : 29,942.17 = 13,198.34 : x
2. Step 2: Convert to fraction form
   21,695.63/29,942.17 = 13,198.34/x
3. Step 3: Cross multiply
   21,695.63x = 29,942.17 × 13,198.34
4. Step 4: Simplify right side
   21,695.63x = 395,186,981.86
5. Step 5: Solve for x
   x = 395,186,981.86/21,695.63
6. Step 6: Final answer
   x = 18,215.05