Finding the Third Proportional to 9,309 and 21,052.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,309 : 21,052.50 = 21,052.50 : x
2. Step 2: Convert to fraction form
   9,309/21,052.50 = 21,052.50/x
3. Step 3: Cross multiply
   9,309x = 21,052.50 × 21,052.50
4. Step 4: Simplify right side
   9,309x = 443,207,756.25
5. Step 5: Solve for x
   x = 443,207,756.25/9,309
6. Step 6: Final answer
   x = 47,610.67