Finding the Fourth Proportional to 142,451.36, 196,390.50 and 91,375.42

Step by Step Solution

1. Step 1: Write the proportion equation
   142,451.36 : 196,390.50 = 91,375.42 : x
2. Step 2: Convert to fraction form
   142,451.36/196,390.50 = 91,375.42/x
3. Step 3: Cross multiply
   142,451.36x = 196,390.50 × 91,375.42
4. Step 4: Simplify right side
   142,451.36x = 17,945,264,421.51
5. Step 5: Solve for x
   x = 17,945,264,421.51/142,451.36
6. Step 6: Final answer
   x = 125,974.68