Finding the Third Proportional to 149,811 and 320,945.25

Step by Step Solution

1. Step 1: Write the proportion equation
   149,811 : 320,945.25 = 320,945.25 : x
2. Step 2: Convert to fraction form
   149,811/320,945.25 = 320,945.25/x
3. Step 3: Cross multiply
   149,811x = 320,945.25 × 320,945.25
4. Step 4: Simplify right side
   149,811x = 103,005,853,497.56
5. Step 5: Solve for x
   x = 103,005,853,497.56/149,811
6. Step 6: Final answer
   x = 687,572.03