Finding the Fourth Proportional to 95.31, 142.76 and 90.25

Step by Step Solution

1. Step 1: Write the proportion equation
   95.31 : 142.76 = 90.25 : x
2. Step 2: Convert to fraction form
   95.31/142.76 = 90.25/x
3. Step 3: Cross multiply
   95.31x = 142.76 × 90.25
4. Step 4: Simplify right side
   95.31x = 12,884.49
5. Step 5: Solve for x
   x = 12,884.49/95.31
6. Step 6: Final answer
   x = 135.18