Finding the Fourth Proportional to 142,081.36, 196,073.88 and 78,419.14

Step by Step Solution

1. Step 1: Write the proportion equation
   142,081.36 : 196,073.88 = 78,419.14 : x
2. Step 2: Convert to fraction form
   142,081.36/196,073.88 = 78,419.14/x
3. Step 3: Cross multiply
   142,081.36x = 196,073.88 × 78,419.14
4. Step 4: Simplify right side
   142,081.36x = 15,375,945,046.06
5. Step 5: Solve for x
   x = 15,375,945,046.06/142,081.36
6. Step 6: Final answer
   x = 108,219.30