Finding the Third Proportional to 11,128 and 15,454

Step by Step Solution

1. Step 1: Write the proportion equation
   11,128 : 15,454 = 15,454 : x
2. Step 2: Convert to fraction form
   11,128/15,454 = 15,454/x
3. Step 3: Cross multiply
   11,128x = 15,454 × 15,454
4. Step 4: Simplify right side
   11,128x = 238,826,116
5. Step 5: Solve for x
   x = 238,826,116/11,128
6. Step 6: Final answer
   x = 21,461.73