Finding the Third Proportional to 405,764.50 and 633,211

Step by Step Solution

1. Step 1: Write the proportion equation
   405,764.50 : 633,211 = 633,211 : x
2. Step 2: Convert to fraction form
   405,764.50/633,211 = 633,211/x
3. Step 3: Cross multiply
   405,764.50x = 633,211 × 633,211
4. Step 4: Simplify right side
   405,764.50x = 400,956,170,521
5. Step 5: Solve for x
   x = 400,956,170,521/405,764.50
6. Step 6: Final answer
   x = 988,149.95