Finding the Third Proportional to 10,119 and 20,639.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,119 : 20,639.50 = 20,639.50 : x
2. Step 2: Convert to fraction form
   10,119/20,639.50 = 20,639.50/x
3. Step 3: Cross multiply
   10,119x = 20,639.50 × 20,639.50
4. Step 4: Simplify right side
   10,119x = 425,988,960.25
5. Step 5: Solve for x
   x = 425,988,960.25/10,119
6. Step 6: Final answer
   x = 42,097.93