Finding the Third Proportional to 20,776.50 and 39,639.38

Step by Step Solution

1. Step 1: Write the proportion equation
   20,776.50 : 39,639.38 = 39,639.38 : x
2. Step 2: Convert to fraction form
   20,776.50/39,639.38 = 39,639.38/x
3. Step 3: Cross multiply
   20,776.50x = 39,639.38 × 39,639.38
4. Step 4: Simplify right side
   20,776.50x = 1,571,280,050.39
5. Step 5: Solve for x
   x = 1,571,280,050.39/20,776.50
6. Step 6: Final answer
   x = 75,627.75