Finding the Third Proportional to 9,666.75 and 20,518.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,666.75 : 20,518.50 = 20,518.50 : x
2. Step 2: Convert to fraction form
   9,666.75/20,518.50 = 20,518.50/x
3. Step 3: Cross multiply
   9,666.75x = 20,518.50 × 20,518.50
4. Step 4: Simplify right side
   9,666.75x = 421,008,842.25
5. Step 5: Solve for x
   x = 421,008,842.25/9,666.75
6. Step 6: Final answer
   x = 43,552.26