Finding the Third Proportional to 9,599.50 and 12,900.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,599.50 : 12,900.50 = 12,900.50 : x
2. Step 2: Convert to fraction form
   9,599.50/12,900.50 = 12,900.50/x
3. Step 3: Cross multiply
   9,599.50x = 12,900.50 × 12,900.50
4. Step 4: Simplify right side
   9,599.50x = 166,422,900.25
5. Step 5: Solve for x
   x = 166,422,900.25/9,599.50
6. Step 6: Final answer
   x = 17,336.62