Finding the Third Proportional to 8,363.57 and 12,942.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,363.57 : 12,942.60 = 12,942.60 : x
2. Step 2: Convert to fraction form
   8,363.57/12,942.60 = 12,942.60/x
3. Step 3: Cross multiply
   8,363.57x = 12,942.60 × 12,942.60
4. Step 4: Simplify right side
   8,363.57x = 167,510,834.09
5. Step 5: Solve for x
   x = 167,510,834.09/8,363.57
6. Step 6: Final answer
   x = 20,028.64