Finding the Fourth Proportional to 142,654.94, 196,863.82 and 78,992.78

Step by Step Solution

1. Step 1: Write the proportion equation
   142,654.94 : 196,863.82 = 78,992.78 : x
2. Step 2: Convert to fraction form
   142,654.94/196,863.82 = 78,992.78/x
3. Step 3: Cross multiply
   142,654.94x = 196,863.82 × 78,992.78
4. Step 4: Simplify right side
   142,654.94x = 15,550,820,423.22
5. Step 5: Solve for x
   x = 15,550,820,423.22/142,654.94
6. Step 6: Final answer
   x = 109,010.04