Finding the Third Proportional to 9,620 and 21,003.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,620 : 21,003.50 = 21,003.50 : x
2. Step 2: Convert to fraction form
   9,620/21,003.50 = 21,003.50/x
3. Step 3: Cross multiply
   9,620x = 21,003.50 × 21,003.50
4. Step 4: Simplify right side
   9,620x = 441,147,012.25
5. Step 5: Solve for x
   x = 441,147,012.25/9,620
6. Step 6: Final answer
   x = 45,857.28