Finding the Fourth Proportional to 142,780.62, 197,038.56 and 79,119.78

Step by Step Solution

1. Step 1: Write the proportion equation
   142,780.62 : 197,038.56 = 79,119.78 : x
2. Step 2: Convert to fraction form
   142,780.62/197,038.56 = 79,119.78/x
3. Step 3: Cross multiply
   142,780.62x = 197,038.56 × 79,119.78
4. Step 4: Simplify right side
   142,780.62x = 15,589,647,518.72
5. Step 5: Solve for x
   x = 15,589,647,518.72/142,780.62
6. Step 6: Final answer
   x = 109,186.02