Finding the Third Proportional to 9,610.50 and 12,987

Step by Step Solution

1. Step 1: Write the proportion equation
   9,610.50 : 12,987 = 12,987 : x
2. Step 2: Convert to fraction form
   9,610.50/12,987 = 12,987/x
3. Step 3: Cross multiply
   9,610.50x = 12,987 × 12,987
4. Step 4: Simplify right side
   9,610.50x = 168,662,169
5. Step 5: Solve for x
   x = 168,662,169/9,610.50
6. Step 6: Final answer
   x = 17,549.78