Finding the Third Proportional to 9,856.50 and 21,097.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,856.50 : 21,097.50 = 21,097.50 : x
2. Step 2: Convert to fraction form
   9,856.50/21,097.50 = 21,097.50/x
3. Step 3: Cross multiply
   9,856.50x = 21,097.50 × 21,097.50
4. Step 4: Simplify right side
   9,856.50x = 445,104,506.25
5. Step 5: Solve for x
   x = 445,104,506.25/9,856.50
6. Step 6: Final answer
   x = 45,158.47