Finding the Third Proportional to 31,311 and 64,692

Step by Step Solution

1. Step 1: Write the proportion equation
   31,311 : 64,692 = 64,692 : x
2. Step 2: Convert to fraction form
   31,311/64,692 = 64,692/x
3. Step 3: Cross multiply
   31,311x = 64,692 × 64,692
4. Step 4: Simplify right side
   31,311x = 4,185,054,864
5. Step 5: Solve for x
   x = 4,185,054,864/31,311
6. Step 6: Final answer
   x = 133,660.85