Finding the Third Proportional to 13,278 and 18,870

Step by Step Solution

1. Step 1: Write the proportion equation
   13,278 : 18,870 = 18,870 : x
2. Step 2: Convert to fraction form
   13,278/18,870 = 18,870/x
3. Step 3: Cross multiply
   13,278x = 18,870 × 18,870
4. Step 4: Simplify right side
   13,278x = 356,076,900
5. Step 5: Solve for x
   x = 356,076,900/13,278
6. Step 6: Final answer
   x = 26,817.06