Finding the Fourth Proportional to 196,519.72, 271,195.86 and 111,636.78

Step by Step Solution

1. Step 1: Write the proportion equation
   196,519.72 : 271,195.86 = 111,636.78 : x
2. Step 2: Convert to fraction form
   196,519.72/271,195.86 = 111,636.78/x
3. Step 3: Cross multiply
   196,519.72x = 271,195.86 × 111,636.78
4. Step 4: Simplify right side
   196,519.72x = 30,275,433,015.89
5. Step 5: Solve for x
   x = 30,275,433,015.89/196,519.72
6. Step 6: Final answer
   x = 154,057.99