Finding the Third Proportional to 9,608.63 and 20,857.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,608.63 : 20,857.50 = 20,857.50 : x
2. Step 2: Convert to fraction form
   9,608.63/20,857.50 = 20,857.50/x
3. Step 3: Cross multiply
   9,608.63x = 20,857.50 × 20,857.50
4. Step 4: Simplify right side
   9,608.63x = 435,035,306.25
5. Step 5: Solve for x
   x = 435,035,306.25/9,608.63
6. Step 6: Final answer
   x = 45,275.50