Finding the Third Proportional to 215,946 and 445,722.75

Step by Step Solution

1. Step 1: Write the proportion equation
   215,946 : 445,722.75 = 445,722.75 : x
2. Step 2: Convert to fraction form
   215,946/445,722.75 = 445,722.75/x
3. Step 3: Cross multiply
   215,946x = 445,722.75 × 445,722.75
4. Step 4: Simplify right side
   215,946x = 198,668,769,867.56
5. Step 5: Solve for x
   x = 198,668,769,867.56/215,946
6. Step 6: Final answer
   x = 919,992.82