Finding the Fourth Proportional to 142,728.96, 196,967.64 and 79,068

Step by Step Solution

1. Step 1: Write the proportion equation
   142,728.96 : 196,967.64 = 79,068 : x
2. Step 2: Convert to fraction form
   142,728.96/196,967.64 = 79,068/x
3. Step 3: Cross multiply
   142,728.96x = 196,967.64 × 79,068
4. Step 4: Simplify right side
   142,728.96x = 15,573,837,359.52
5. Step 5: Solve for x
   x = 15,573,837,359.52/142,728.96
6. Step 6: Final answer
   x = 109,114.77