Finding the Third Proportional to 31,620 and 67,723

Step by Step Solution

1. Step 1: Write the proportion equation
   31,620 : 67,723 = 67,723 : x
2. Step 2: Convert to fraction form
   31,620/67,723 = 67,723/x
3. Step 3: Cross multiply
   31,620x = 67,723 × 67,723
4. Step 4: Simplify right side
   31,620x = 4,586,404,729
5. Step 5: Solve for x
   x = 4,586,404,729/31,620
6. Step 6: Final answer
   x = 145,047.59