Finding the Third Proportional to 11,187 and 12,402

Step by Step Solution

1. Step 1: Write the proportion equation
   11,187 : 12,402 = 12,402 : x
2. Step 2: Convert to fraction form
   11,187/12,402 = 12,402/x
3. Step 3: Cross multiply
   11,187x = 12,402 × 12,402
4. Step 4: Simplify right side
   11,187x = 153,809,604
5. Step 5: Solve for x
   x = 153,809,604/11,187
6. Step 6: Final answer
   x = 13,748.96