Finding the Third Proportional to 9,603 and 12,817.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,603 : 12,817.50 = 12,817.50 : x
2. Step 2: Convert to fraction form
   9,603/12,817.50 = 12,817.50/x
3. Step 3: Cross multiply
   9,603x = 12,817.50 × 12,817.50
4. Step 4: Simplify right side
   9,603x = 164,288,306.25
5. Step 5: Solve for x
   x = 164,288,306.25/9,603
6. Step 6: Final answer
   x = 17,108.02