Finding the Fourth Proportional to 142,329.96, 196,415.38 and 78,667.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,329.96 : 196,415.38 = 78,667.76 : x
2. Step 2: Convert to fraction form
   142,329.96/196,415.38 = 78,667.76/x
3. Step 3: Cross multiply
   142,329.96x = 196,415.38 × 78,667.76
4. Step 4: Simplify right side
   142,329.96x = 15,451,557,974.15
5. Step 5: Solve for x
   x = 15,451,557,974.15/142,329.96
6. Step 6: Final answer
   x = 108,561.53