Finding the Third Proportional to 10,449.75 and 21,169.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,449.75 : 21,169.50 = 21,169.50 : x
2. Step 2: Convert to fraction form
   10,449.75/21,169.50 = 21,169.50/x
3. Step 3: Cross multiply
   10,449.75x = 21,169.50 × 21,169.50
4. Step 4: Simplify right side
   10,449.75x = 448,147,730.25
5. Step 5: Solve for x
   x = 448,147,730.25/10,449.75
6. Step 6: Final answer
   x = 42,885.98