Finding the Fourth Proportional to 142,744.57, 196,979.75 and 79,078.57

Step by Step Solution

1. Step 1: Write the proportion equation
   142,744.57 : 196,979.75 = 79,078.57 : x
2. Step 2: Convert to fraction form
   142,744.57/196,979.75 = 79,078.57/x
3. Step 3: Cross multiply
   142,744.57x = 196,979.75 × 79,078.57
4. Step 4: Simplify right side
   142,744.57x = 15,576,876,061.12
5. Step 5: Solve for x
   x = 15,576,876,061.12/142,744.57
6. Step 6: Final answer
   x = 109,124.13