Finding the Third Proportional to 299,851.50 and 644,166

Step by Step Solution

1. Step 1: Write the proportion equation
   299,851.50 : 644,166 = 644,166 : x
2. Step 2: Convert to fraction form
   299,851.50/644,166 = 644,166/x
3. Step 3: Cross multiply
   299,851.50x = 644,166 × 644,166
4. Step 4: Simplify right side
   299,851.50x = 414,949,835,556
5. Step 5: Solve for x
   x = 414,949,835,556/299,851.50
6. Step 6: Final answer
   x = 1,383,851.12