Finding the Third Proportional to 9,720.47 and 20,856.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,720.47 : 20,856.94 = 20,856.94 : x
2. Step 2: Convert to fraction form
   9,720.47/20,856.94 = 20,856.94/x
3. Step 3: Cross multiply
   9,720.47x = 20,856.94 × 20,856.94
4. Step 4: Simplify right side
   9,720.47x = 435,011,841.88
5. Step 5: Solve for x
   x = 435,011,841.88/9,720.47
6. Step 6: Final answer
   x = 44,752.15