Finding the Fourth Proportional to 142,919.83, 197,222.61 and 79,256.26

Step by Step Solution

1. Step 1: Write the proportion equation
   142,919.83 : 197,222.61 = 79,256.26 : x
2. Step 2: Convert to fraction form
   142,919.83/197,222.61 = 79,256.26/x
3. Step 3: Cross multiply
   142,919.83x = 197,222.61 × 79,256.26
4. Step 4: Simplify right side
   142,919.83x = 15,631,126,456.04
5. Step 5: Solve for x
   x = 15,631,126,456.04/142,919.83
6. Step 6: Final answer
   x = 109,369.89