Finding the Third Proportional to 20,688 and 30,876

Step by Step Solution

1. Step 1: Write the proportion equation
   20,688 : 30,876 = 30,876 : x
2. Step 2: Convert to fraction form
   20,688/30,876 = 30,876/x
3. Step 3: Cross multiply
   20,688x = 30,876 × 30,876
4. Step 4: Simplify right side
   20,688x = 953,327,376
5. Step 5: Solve for x
   x = 953,327,376/20,688
6. Step 6: Final answer
   x = 46,081.18