Finding the Third Proportional to 308,047.50 and 620,669.25

Step by Step Solution

1. Step 1: Write the proportion equation
   308,047.50 : 620,669.25 = 620,669.25 : x
2. Step 2: Convert to fraction form
   308,047.50/620,669.25 = 620,669.25/x
3. Step 3: Cross multiply
   308,047.50x = 620,669.25 × 620,669.25
4. Step 4: Simplify right side
   308,047.50x = 385,230,317,895.56
5. Step 5: Solve for x
   x = 385,230,317,895.56/308,047.50
6. Step 6: Final answer
   x = 1,250,554.92