Finding the Third Proportional to 12.50 and 30.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12.50 : 30.81 = 30.81 : x
2. Step 2: Convert to fraction form
   12.50/30.81 = 30.81/x
3. Step 3: Cross multiply
   12.50x = 30.81 × 30.81
4. Step 4: Simplify right side
   12.50x = 949.41
5. Step 5: Solve for x
   x = 949.41/12.50
6. Step 6: Final answer
   x = 75.95