Finding the Fourth Proportional to 142,012.72, 195,974.24 and 78,350.48

Step by Step Solution

1. Step 1: Write the proportion equation
   142,012.72 : 195,974.24 = 78,350.48 : x
2. Step 2: Convert to fraction form
   142,012.72/195,974.24 = 78,350.48/x
3. Step 3: Cross multiply
   142,012.72x = 195,974.24 × 78,350.48
4. Step 4: Simplify right side
   142,012.72x = 15,354,675,771.64
5. Step 5: Solve for x
   x = 15,354,675,771.64/142,012.72
6. Step 6: Final answer
   x = 108,121.83