Finding the Fourth Proportional to 142,667.92, 196,877.26 and 78,134.32

Step by Step Solution

1. Step 1: Write the proportion equation
   142,667.92 : 196,877.26 = 78,134.32 : x
2. Step 2: Convert to fraction form
   142,667.92/196,877.26 = 78,134.32/x
3. Step 3: Cross multiply
   142,667.92x = 196,877.26 × 78,134.32
4. Step 4: Simplify right side
   142,667.92x = 15,382,870,833.56
5. Step 5: Solve for x
   x = 15,382,870,833.56/142,667.92
6. Step 6: Final answer
   x = 107,822.91