Finding the Fourth Proportional to 142,616.09, 196,812.56 and 78,084.27

Step by Step Solution

1. Step 1: Write the proportion equation
   142,616.09 : 196,812.56 = 78,084.27 : x
2. Step 2: Convert to fraction form
   142,616.09/196,812.56 = 78,084.27/x
3. Step 3: Cross multiply
   142,616.09x = 196,812.56 × 78,084.27
4. Step 4: Simplify right side
   142,616.09x = 15,367,965,269.64
5. Step 5: Solve for x
   x = 15,367,965,269.64/142,616.09
6. Step 6: Final answer
   x = 107,757.58