Finding the Third Proportional to 11,920.50 and 17,868.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,920.50 : 17,868.09 = 17,868.09 : x
2. Step 2: Convert to fraction form
   11,920.50/17,868.09 = 17,868.09/x
3. Step 3: Cross multiply
   11,920.50x = 17,868.09 × 17,868.09
4. Step 4: Simplify right side
   11,920.50x = 319,268,774.26
5. Step 5: Solve for x
   x = 319,268,774.26/11,920.50
6. Step 6: Final answer
   x = 26,783.17