Finding the Third Proportional to 30,622.50 and 39,615.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,622.50 : 39,615.50 = 39,615.50 : x
2. Step 2: Convert to fraction form
   30,622.50/39,615.50 = 39,615.50/x
3. Step 3: Cross multiply
   30,622.50x = 39,615.50 × 39,615.50
4. Step 4: Simplify right side
   30,622.50x = 1,569,387,840.25
5. Step 5: Solve for x
   x = 1,569,387,840.25/30,622.50
6. Step 6: Final answer
   x = 51,249.50