Finding the Third Proportional to 11,403 and 13,131

Step by Step Solution

1. Step 1: Write the proportion equation
   11,403 : 13,131 = 13,131 : x
2. Step 2: Convert to fraction form
   11,403/13,131 = 13,131/x
3. Step 3: Cross multiply
   11,403x = 13,131 × 13,131
4. Step 4: Simplify right side
   11,403x = 172,423,161
5. Step 5: Solve for x
   x = 172,423,161/11,403
6. Step 6: Final answer
   x = 15,120.86