Finding the Fourth Proportional to 142,725, 196,960.50 and 86,136.39

Step by Step Solution

1. Step 1: Write the proportion equation
   142,725 : 196,960.50 = 86,136.39 : x
2. Step 2: Convert to fraction form
   142,725/196,960.50 = 86,136.39/x
3. Step 3: Cross multiply
   142,725x = 196,960.50 × 86,136.39
4. Step 4: Simplify right side
   142,725x = 16,965,466,442.60
5. Step 5: Solve for x
   x = 16,965,466,442.60/142,725
6. Step 6: Final answer
   x = 118,868.22