Finding the Fourth Proportional to 196,569, 271,266 and 111,690.72

Step by Step Solution

1. Step 1: Write the proportion equation
   196,569 : 271,266 = 111,690.72 : x
2. Step 2: Convert to fraction form
   196,569/271,266 = 111,690.72/x
3. Step 3: Cross multiply
   196,569x = 271,266 × 111,690.72
4. Step 4: Simplify right side
   196,569x = 30,297,894,851.52
5. Step 5: Solve for x
   x = 30,297,894,851.52/196,569
6. Step 6: Final answer
   x = 154,133.64