Finding the Third Proportional to 11,870 and 15,836

Step by Step Solution

1. Step 1: Write the proportion equation
   11,870 : 15,836 = 15,836 : x
2. Step 2: Convert to fraction form
   11,870/15,836 = 15,836/x
3. Step 3: Cross multiply
   11,870x = 15,836 × 15,836
4. Step 4: Simplify right side
   11,870x = 250,778,896
5. Step 5: Solve for x
   x = 250,778,896/11,870
6. Step 6: Final answer
   x = 21,127.12