Finding the Fourth Proportional to 142,740.20, 196,983.06 and 79,079

Step by Step Solution

1. Step 1: Write the proportion equation
   142,740.20 : 196,983.06 = 79,079 : x
2. Step 2: Convert to fraction form
   142,740.20/196,983.06 = 79,079/x
3. Step 3: Cross multiply
   142,740.20x = 196,983.06 × 79,079
4. Step 4: Simplify right side
   142,740.20x = 15,577,223,401.74
5. Step 5: Solve for x
   x = 15,577,223,401.74/142,740.20
6. Step 6: Final answer
   x = 109,129.90