Finding the Fourth Proportional to 142,604.87, 196,794.78 and 78,078.29

Step by Step Solution

1. Step 1: Write the proportion equation
   142,604.87 : 196,794.78 = 78,078.29 : x
2. Step 2: Convert to fraction form
   142,604.87/196,794.78 = 78,078.29/x
3. Step 3: Cross multiply
   142,604.87x = 196,794.78 × 78,078.29
4. Step 4: Simplify right side
   142,604.87x = 15,365,399,903.33
5. Step 5: Solve for x
   x = 15,365,399,903.33/142,604.87
6. Step 6: Final answer
   x = 107,748.07