Finding the Fourth Proportional to 142,678.62, 196,709.79 and 122,749.59

Step by Step Solution

1. Step 1: Write the proportion equation
   142,678.62 : 196,709.79 = 122,749.59 : x
2. Step 2: Convert to fraction form
   142,678.62/196,709.79 = 122,749.59/x
3. Step 3: Cross multiply
   142,678.62x = 196,709.79 × 122,749.59
4. Step 4: Simplify right side
   142,678.62x = 24,146,046,071.49
5. Step 5: Solve for x
   x = 24,146,046,071.49/142,678.62
6. Step 6: Final answer
   x = 169,233.81