Finding the Fourth Proportional to 142,772.65, 197,023.31 and 79,109.89

Step by Step Solution

1. Step 1: Write the proportion equation
   142,772.65 : 197,023.31 = 79,109.89 : x
2. Step 2: Convert to fraction form
   142,772.65/197,023.31 = 79,109.89/x
3. Step 3: Cross multiply
   142,772.65x = 197,023.31 × 79,109.89
4. Step 4: Simplify right side
   142,772.65x = 15,586,491,396.42
5. Step 5: Solve for x
   x = 15,586,491,396.42/142,772.65
6. Step 6: Final answer
   x = 109,170.01