Finding the Fourth Proportional to 196,640.94, 271,385.31 and 120,204.78

Step by Step Solution

1. Step 1: Write the proportion equation
   196,640.94 : 271,385.31 = 120,204.78 : x
2. Step 2: Convert to fraction form
   196,640.94/271,385.31 = 120,204.78/x
3. Step 3: Cross multiply
   196,640.94x = 271,385.31 × 120,204.78
4. Step 4: Simplify right side
   196,640.94x = 32,621,811,483.78
5. Step 5: Solve for x
   x = 32,621,811,483.78/196,640.94
6. Step 6: Final answer
   x = 165,895.32