Finding the Third Proportional to 299,852.50 and 644,168

Step by Step Solution

1. Step 1: Write the proportion equation
   299,852.50 : 644,168 = 644,168 : x
2. Step 2: Convert to fraction form
   299,852.50/644,168 = 644,168/x
3. Step 3: Cross multiply
   299,852.50x = 644,168 × 644,168
4. Step 4: Simplify right side
   299,852.50x = 414,952,412,224
5. Step 5: Solve for x
   x = 414,952,412,224/299,852.50
6. Step 6: Final answer
   x = 1,383,855.10