Finding the Third Proportional to 31.50 and 76.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31.50 : 76.63 = 76.63 : x
2. Step 2: Convert to fraction form
   31.50/76.63 = 76.63/x
3. Step 3: Cross multiply
   31.50x = 76.63 × 76.63
4. Step 4: Simplify right side
   31.50x = 5,871.39
5. Step 5: Solve for x
   x = 5,871.39/31.50
6. Step 6: Final answer
   x = 186.39