Finding the Third Proportional to 11,396 and 12,620

Step by Step Solution

1. Step 1: Write the proportion equation
   11,396 : 12,620 = 12,620 : x
2. Step 2: Convert to fraction form
   11,396/12,620 = 12,620/x
3. Step 3: Cross multiply
   11,396x = 12,620 × 12,620
4. Step 4: Simplify right side
   11,396x = 159,264,400
5. Step 5: Solve for x
   x = 159,264,400/11,396
6. Step 6: Final answer
   x = 13,975.47