Finding the Fourth Proportional to 95.34, 142.43 and 86.82

Step by Step Solution

1. Step 1: Write the proportion equation
   95.34 : 142.43 = 86.82 : x
2. Step 2: Convert to fraction form
   95.34/142.43 = 86.82/x
3. Step 3: Cross multiply
   95.34x = 142.43 × 86.82
4. Step 4: Simplify right side
   95.34x = 12,365.34
5. Step 5: Solve for x
   x = 12,365.34/95.34
6. Step 6: Final answer
   x = 129.70