Finding the Third Proportional to 11,218.88 and 17,420.63

Step by Step Solution

1. Step 1: Write the proportion equation
   11,218.88 : 17,420.63 = 17,420.63 : x
2. Step 2: Convert to fraction form
   11,218.88/17,420.63 = 17,420.63/x
3. Step 3: Cross multiply
   11,218.88x = 17,420.63 × 17,420.63
4. Step 4: Simplify right side
   11,218.88x = 303,478,175.39
5. Step 5: Solve for x
   x = 303,478,175.39/11,218.88
6. Step 6: Final answer
   x = 27,050.68