Finding the Third Proportional to 99,039 and 213,858

Step by Step Solution

1. Step 1: Write the proportion equation
   99,039 : 213,858 = 213,858 : x
2. Step 2: Convert to fraction form
   99,039/213,858 = 213,858/x
3. Step 3: Cross multiply
   99,039x = 213,858 × 213,858
4. Step 4: Simplify right side
   99,039x = 45,735,244,164
5. Step 5: Solve for x
   x = 45,735,244,164/99,039
6. Step 6: Final answer
   x = 461,790.25