Finding the Third Proportional to 356,740 and 742,856

Step by Step Solution

1. Step 1: Write the proportion equation
   356,740 : 742,856 = 742,856 : x
2. Step 2: Convert to fraction form
   356,740/742,856 = 742,856/x
3. Step 3: Cross multiply
   356,740x = 742,856 × 742,856
4. Step 4: Simplify right side
   356,740x = 551,835,036,736
5. Step 5: Solve for x
   x = 551,835,036,736/356,740
6. Step 6: Final answer
   x = 1,546,882.99