Finding the Fourth Proportional to 142,742.20, 196,985.82 and 79,081

Step by Step Solution

1. Step 1: Write the proportion equation
   142,742.20 : 196,985.82 = 79,081 : x
2. Step 2: Convert to fraction form
   142,742.20/196,985.82 = 79,081/x
3. Step 3: Cross multiply
   142,742.20x = 196,985.82 × 79,081
4. Step 4: Simplify right side
   142,742.20x = 15,577,835,631.42
5. Step 5: Solve for x
   x = 15,577,835,631.42/142,742.20
6. Step 6: Final answer
   x = 109,132.66