Finding the Fourth Proportional to 142,162.38, 196,181.73 and 78,498.54

Step by Step Solution

1. Step 1: Write the proportion equation
   142,162.38 : 196,181.73 = 78,498.54 : x
2. Step 2: Convert to fraction form
   142,162.38/196,181.73 = 78,498.54/x
3. Step 3: Cross multiply
   142,162.38x = 196,181.73 × 78,498.54
4. Step 4: Simplify right side
   142,162.38x = 15,399,979,379.67
5. Step 5: Solve for x
   x = 15,399,979,379.67/142,162.38
6. Step 6: Final answer
   x = 108,326.69