Finding the Third Proportional to 10,280 and 14,690

Step by Step Solution

1. Step 1: Write the proportion equation
   10,280 : 14,690 = 14,690 : x
2. Step 2: Convert to fraction form
   10,280/14,690 = 14,690/x
3. Step 3: Cross multiply
   10,280x = 14,690 × 14,690
4. Step 4: Simplify right side
   10,280x = 215,796,100
5. Step 5: Solve for x
   x = 215,796,100/10,280
6. Step 6: Final answer
   x = 20,991.84