Finding the Fourth Proportional to 142,709.99, 196,946.27 and 79,047.78

Step by Step Solution

1. Step 1: Write the proportion equation
   142,709.99 : 196,946.27 = 79,047.78 : x
2. Step 2: Convert to fraction form
   142,709.99/196,946.27 = 79,047.78/x
3. Step 3: Cross multiply
   142,709.99x = 196,946.27 × 79,047.78
4. Step 4: Simplify right side
   142,709.99x = 15,568,164,585.42
5. Step 5: Solve for x
   x = 15,568,164,585.42/142,709.99
6. Step 6: Final answer
   x = 109,089.53