Finding the Third Proportional to 11,211 and 12,411

Step by Step Solution

1. Step 1: Write the proportion equation
   11,211 : 12,411 = 12,411 : x
2. Step 2: Convert to fraction form
   11,211/12,411 = 12,411/x
3. Step 3: Cross multiply
   11,211x = 12,411 × 12,411
4. Step 4: Simplify right side
   11,211x = 154,032,921
5. Step 5: Solve for x
   x = 154,032,921/11,211
6. Step 6: Final answer
   x = 13,739.45