Finding the Fourth Proportional to 142,742.88, 196,977.42 and 79,076.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,742.88 : 196,977.42 = 79,076.88 : x
2. Step 2: Convert to fraction form
   142,742.88/196,977.42 = 79,076.88/x
3. Step 3: Cross multiply
   142,742.88x = 196,977.42 × 79,076.88
4. Step 4: Simplify right side
   142,742.88x = 15,576,359,804.05
5. Step 5: Solve for x
   x = 15,576,359,804.05/142,742.88
6. Step 6: Final answer
   x = 109,121.80