Finding the Third Proportional to 11,358 and 17,139.38

Step by Step Solution

1. Step 1: Write the proportion equation
   11,358 : 17,139.38 = 17,139.38 : x
2. Step 2: Convert to fraction form
   11,358/17,139.38 = 17,139.38/x
3. Step 3: Cross multiply
   11,358x = 17,139.38 × 17,139.38
4. Step 4: Simplify right side
   11,358x = 293,758,175.39
5. Step 5: Solve for x
   x = 293,758,175.39/11,358
6. Step 6: Final answer
   x = 25,863.55