Finding the Third Proportional to 323,845 and 490,285.50

Step by Step Solution

1. Step 1: Write the proportion equation
   323,845 : 490,285.50 = 490,285.50 : x
2. Step 2: Convert to fraction form
   323,845/490,285.50 = 490,285.50/x
3. Step 3: Cross multiply
   323,845x = 490,285.50 × 490,285.50
4. Step 4: Simplify right side
   323,845x = 240,379,871,510.25
5. Step 5: Solve for x
   x = 240,379,871,510.25/323,845
6. Step 6: Final answer
   x = 742,268.28