Finding the Third Proportional to 440,983.50 and 621,019.50

Step by Step Solution

1. Step 1: Write the proportion equation
   440,983.50 : 621,019.50 = 621,019.50 : x
2. Step 2: Convert to fraction form
   440,983.50/621,019.50 = 621,019.50/x
3. Step 3: Cross multiply
   440,983.50x = 621,019.50 × 621,019.50
4. Step 4: Simplify right side
   440,983.50x = 385,665,219,380.25
5. Step 5: Solve for x
   x = 385,665,219,380.25/440,983.50
6. Step 6: Final answer
   x = 874,557.03