Finding the Third Proportional to 9,902.25 and 19,966.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,902.25 : 19,966.50 = 19,966.50 : x
2. Step 2: Convert to fraction form
   9,902.25/19,966.50 = 19,966.50/x
3. Step 3: Cross multiply
   9,902.25x = 19,966.50 × 19,966.50
4. Step 4: Simplify right side
   9,902.25x = 398,661,122.25
5. Step 5: Solve for x
   x = 398,661,122.25/9,902.25
6. Step 6: Final answer
   x = 40,259.65