Finding the Third Proportional to 11,920.69 and 17,515.88

Step by Step Solution

1. Step 1: Write the proportion equation
   11,920.69 : 17,515.88 = 17,515.88 : x
2. Step 2: Convert to fraction form
   11,920.69/17,515.88 = 17,515.88/x
3. Step 3: Cross multiply
   11,920.69x = 17,515.88 × 17,515.88
4. Step 4: Simplify right side
   11,920.69x = 306,805,877.02
5. Step 5: Solve for x
   x = 306,805,877.02/11,920.69
6. Step 6: Final answer
   x = 25,737.26