Finding the Fourth Proportional to 142,290, 196,451.52 and 91,324.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,290 : 196,451.52 = 91,324.56 : x
2. Step 2: Convert to fraction form
   142,290/196,451.52 = 91,324.56/x
3. Step 3: Cross multiply
   142,290x = 196,451.52 × 91,324.56
4. Step 4: Simplify right side
   142,290x = 17,940,848,625.33
5. Step 5: Solve for x
   x = 17,940,848,625.33/142,290
6. Step 6: Final answer
   x = 126,086.50