Finding the Third Proportional to 299,475 and 648,745.50

Step by Step Solution

1. Step 1: Write the proportion equation
   299,475 : 648,745.50 = 648,745.50 : x
2. Step 2: Convert to fraction form
   299,475/648,745.50 = 648,745.50/x
3. Step 3: Cross multiply
   299,475x = 648,745.50 × 648,745.50
4. Step 4: Simplify right side
   299,475x = 420,870,723,770.25
5. Step 5: Solve for x
   x = 420,870,723,770.25/299,475
6. Step 6: Final answer
   x = 1,405,361.80