Finding the Fourth Proportional to 95.50, 131.67 and 78.10

Step by Step Solution

1. Step 1: Write the proportion equation
   95.50 : 131.67 = 78.10 : x
2. Step 2: Convert to fraction form
   95.50/131.67 = 78.10/x
3. Step 3: Cross multiply
   95.50x = 131.67 × 78.10
4. Step 4: Simplify right side
   95.50x = 10,283.43
5. Step 5: Solve for x
   x = 10,283.43/95.50
6. Step 6: Final answer
   x = 107.68