Finding the Fourth Proportional to 142,797, 197,067.72 and 79,133.40

Step by Step Solution

1. Step 1: Write the proportion equation
   142,797 : 197,067.72 = 79,133.40 : x
2. Step 2: Convert to fraction form
   142,797/197,067.72 = 79,133.40/x
3. Step 3: Cross multiply
   142,797x = 197,067.72 × 79,133.40
4. Step 4: Simplify right side
   142,797x = 15,594,638,713.85
5. Step 5: Solve for x
   x = 15,594,638,713.85/142,797
6. Step 6: Final answer
   x = 109,208.45