Finding the Fourth Proportional to 196,921.50, 271,642.24 and 129,047.95

Step by Step Solution

1. Step 1: Write the proportion equation
   196,921.50 : 271,642.24 = 129,047.95 : x
2. Step 2: Convert to fraction form
   196,921.50/271,642.24 = 129,047.95/x
3. Step 3: Cross multiply
   196,921.50x = 271,642.24 × 129,047.95
4. Step 4: Simplify right side
   196,921.50x = 35,054,874,706.27
5. Step 5: Solve for x
   x = 35,054,874,706.27/196,921.50
6. Step 6: Final answer
   x = 178,014.46