Finding the Third Proportional to 140,638.50 and 303,268.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,638.50 : 303,268.50 = 303,268.50 : x
2. Step 2: Convert to fraction form
   140,638.50/303,268.50 = 303,268.50/x
3. Step 3: Cross multiply
   140,638.50x = 303,268.50 × 303,268.50
4. Step 4: Simplify right side
   140,638.50x = 91,971,783,092.25
5. Step 5: Solve for x
   x = 91,971,783,092.25/140,638.50
6. Step 6: Final answer
   x = 653,958.79