Finding the Third Proportional to 12,658 and 18,970

Step by Step Solution

1. Step 1: Write the proportion equation
   12,658 : 18,970 = 18,970 : x
2. Step 2: Convert to fraction form
   12,658/18,970 = 18,970/x
3. Step 3: Cross multiply
   12,658x = 18,970 × 18,970
4. Step 4: Simplify right side
   12,658x = 359,860,900
5. Step 5: Solve for x
   x = 359,860,900/12,658
6. Step 6: Final answer
   x = 28,429.52