Finding the Third Proportional to 11,119.78 and 17,317.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11,119.78 : 17,317.55 = 17,317.55 : x
2. Step 2: Convert to fraction form
   11,119.78/17,317.55 = 17,317.55/x
3. Step 3: Cross multiply
   11,119.78x = 17,317.55 × 17,317.55
4. Step 4: Simplify right side
   11,119.78x = 299,897,429.77
5. Step 5: Solve for x
   x = 299,897,429.77/11,119.78
6. Step 6: Final answer
   x = 26,969.72