Finding the Third Proportional to 31.50 and 63.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31.50 : 63.94 = 63.94 : x
2. Step 2: Convert to fraction form
   31.50/63.94 = 63.94/x
3. Step 3: Cross multiply
   31.50x = 63.94 × 63.94
4. Step 4: Simplify right side
   31.50x = 4,088.00
5. Step 5: Solve for x
   x = 4,088.00/31.50
6. Step 6: Final answer
   x = 129.78