Finding the Fourth Proportional to 142,738.78, 196,986.54 and 79,076.83

Step by Step Solution

1. Step 1: Write the proportion equation
   142,738.78 : 196,986.54 = 79,076.83 : x
2. Step 2: Convert to fraction form
   142,738.78/196,986.54 = 79,076.83/x
3. Step 3: Cross multiply
   142,738.78x = 196,986.54 × 79,076.83
4. Step 4: Simplify right side
   142,738.78x = 15,577,070,939.94
5. Step 5: Solve for x
   x = 15,577,070,939.94/142,738.78
6. Step 6: Final answer
   x = 109,129.92