Finding the Third Proportional to 679,180 and 919,123

Step by Step Solution

1. Step 1: Write the proportion equation
   679,180 : 919,123 = 919,123 : x
2. Step 2: Convert to fraction form
   679,180/919,123 = 919,123/x
3. Step 3: Cross multiply
   679,180x = 919,123 × 919,123
4. Step 4: Simplify right side
   679,180x = 844,787,089,129
5. Step 5: Solve for x
   x = 844,787,089,129/679,180
6. Step 6: Final answer
   x = 1,243,833.87