Finding the Third Proportional to 11,891 and 25,429

Step by Step Solution

1. Step 1: Write the proportion equation
   11,891 : 25,429 = 25,429 : x
2. Step 2: Convert to fraction form
   11,891/25,429 = 25,429/x
3. Step 3: Cross multiply
   11,891x = 25,429 × 25,429
4. Step 4: Simplify right side
   11,891x = 646,634,041
5. Step 5: Solve for x
   x = 646,634,041/11,891
6. Step 6: Final answer
   x = 54,380.12