Finding the Fourth Proportional to 142,949, 197,140.50 and 89,238.98

Step by Step Solution

1. Step 1: Write the proportion equation
   142,949 : 197,140.50 = 89,238.98 : x
2. Step 2: Convert to fraction form
   142,949/197,140.50 = 89,238.98/x
3. Step 3: Cross multiply
   142,949x = 197,140.50 × 89,238.98
4. Step 4: Simplify right side
   142,949x = 17,592,617,136.69
5. Step 5: Solve for x
   x = 17,592,617,136.69/142,949
6. Step 6: Final answer
   x = 123,069.19