Finding the Fourth Proportional to 142,002.42, 195,964 and 78,340.20

Step by Step Solution

1. Step 1: Write the proportion equation
   142,002.42 : 195,964 = 78,340.20 : x
2. Step 2: Convert to fraction form
   142,002.42/195,964 = 78,340.20/x
3. Step 3: Cross multiply
   142,002.42x = 195,964 × 78,340.20
4. Step 4: Simplify right side
   142,002.42x = 15,351,858,952.80
5. Step 5: Solve for x
   x = 15,351,858,952.80/142,002.42
6. Step 6: Final answer
   x = 108,109.84