Finding the Fourth Proportional to 141,678.56, 195,516.42 and 78,016.21

Step by Step Solution

1. Step 1: Write the proportion equation
   141,678.56 : 195,516.42 = 78,016.21 : x
2. Step 2: Convert to fraction form
   141,678.56/195,516.42 = 78,016.21/x
3. Step 3: Cross multiply
   141,678.56x = 195,516.42 × 78,016.21
4. Step 4: Simplify right side
   141,678.56x = 15,253,449,299.82
5. Step 5: Solve for x
   x = 15,253,449,299.82/141,678.56
6. Step 6: Final answer
   x = 107,662.37