Finding the Third Proportional to 31,559.50 and 68,039

Step by Step Solution

1. Step 1: Write the proportion equation
   31,559.50 : 68,039 = 68,039 : x
2. Step 2: Convert to fraction form
   31,559.50/68,039 = 68,039/x
3. Step 3: Cross multiply
   31,559.50x = 68,039 × 68,039
4. Step 4: Simplify right side
   31,559.50x = 4,629,305,521
5. Step 5: Solve for x
   x = 4,629,305,521/31,559.50
6. Step 6: Final answer
   x = 146,685.01