Finding the Fourth Proportional to 142,834.86, 197,109 and 79,172.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142,834.86 : 197,109 = 79,172.10 : x
2. Step 2: Convert to fraction form
   142,834.86/197,109 = 79,172.10/x
3. Step 3: Cross multiply
   142,834.86x = 197,109 × 79,172.10
4. Step 4: Simplify right side
   142,834.86x = 15,605,533,458.90
5. Step 5: Solve for x
   x = 15,605,533,458.90/142,834.86
6. Step 6: Final answer
   x = 109,255.78