Finding the Third Proportional to 15,205.50 and 17,986.50

Step by Step Solution

1. Step 1: Write the proportion equation
   15,205.50 : 17,986.50 = 17,986.50 : x
2. Step 2: Convert to fraction form
   15,205.50/17,986.50 = 17,986.50/x
3. Step 3: Cross multiply
   15,205.50x = 17,986.50 × 17,986.50
4. Step 4: Simplify right side
   15,205.50x = 323,514,182.25
5. Step 5: Solve for x
   x = 323,514,182.25/15,205.50
6. Step 6: Final answer
   x = 21,276.13