Finding the Fourth Proportional to 142,709.25, 196,938.78 and 79,051.17

Step by Step Solution

1. Step 1: Write the proportion equation
   142,709.25 : 196,938.78 = 79,051.17 : x
2. Step 2: Convert to fraction form
   142,709.25/196,938.78 = 79,051.17/x
3. Step 3: Cross multiply
   142,709.25x = 196,938.78 × 79,051.17
4. Step 4: Simplify right side
   142,709.25x = 15,568,240,977.37
5. Step 5: Solve for x
   x = 15,568,240,977.37/142,709.25
6. Step 6: Final answer
   x = 109,090.62