Finding the Third Proportional to 300,888 and 648,796.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,888 : 648,796.50 = 648,796.50 : x
2. Step 2: Convert to fraction form
   300,888/648,796.50 = 648,796.50/x
3. Step 3: Cross multiply
   300,888x = 648,796.50 × 648,796.50
4. Step 4: Simplify right side
   300,888x = 420,936,898,412.25
5. Step 5: Solve for x
   x = 420,936,898,412.25/300,888
6. Step 6: Final answer
   x = 1,398,982.01