Finding the Fourth Proportional to 142,067.69, 196,052.49 and 78,405.48

Step by Step Solution

1. Step 1: Write the proportion equation
   142,067.69 : 196,052.49 = 78,405.48 : x
2. Step 2: Convert to fraction form
   142,067.69/196,052.49 = 78,405.48/x
3. Step 3: Cross multiply
   142,067.69x = 196,052.49 × 78,405.48
4. Step 4: Simplify right side
   142,067.69x = 15,371,589,583.65
5. Step 5: Solve for x
   x = 15,371,589,583.65/142,067.69
6. Step 6: Final answer
   x = 108,199.06