Finding the Fourth Proportional to 142,821.42, 197,085.74 and 79,155.42

Step by Step Solution

1. Step 1: Write the proportion equation
   142,821.42 : 197,085.74 = 79,155.42 : x
2. Step 2: Convert to fraction form
   142,821.42/197,085.74 = 79,155.42/x
3. Step 3: Cross multiply
   142,821.42x = 197,085.74 × 79,155.42
4. Step 4: Simplify right side
   142,821.42x = 15,600,404,129.93
5. Step 5: Solve for x
   x = 15,600,404,129.93/142,821.42
6. Step 6: Final answer
   x = 109,230.14