Finding the Third Proportional to 8,090 and 12,970

Step by Step Solution

1. Step 1: Write the proportion equation
   8,090 : 12,970 = 12,970 : x
2. Step 2: Convert to fraction form
   8,090/12,970 = 12,970/x
3. Step 3: Cross multiply
   8,090x = 12,970 × 12,970
4. Step 4: Simplify right side
   8,090x = 168,220,900
5. Step 5: Solve for x
   x = 168,220,900/8,090
6. Step 6: Final answer
   x = 20,793.68