Finding the Fourth Proportional to 142,081.90, 196,072.63 and 78,419.26

Step by Step Solution

1. Step 1: Write the proportion equation
   142,081.90 : 196,072.63 = 78,419.26 : x
2. Step 2: Convert to fraction form
   142,081.90/196,072.63 = 78,419.26/x
3. Step 3: Cross multiply
   142,081.90x = 196,072.63 × 78,419.26
4. Step 4: Simplify right side
   142,081.90x = 15,375,870,550.85
5. Step 5: Solve for x
   x = 15,375,870,550.85/142,081.90
6. Step 6: Final answer
   x = 108,218.36