Finding the Third Proportional to 395,928 and 629,167.50

Step by Step Solution

1. Step 1: Write the proportion equation
   395,928 : 629,167.50 = 629,167.50 : x
2. Step 2: Convert to fraction form
   395,928/629,167.50 = 629,167.50/x
3. Step 3: Cross multiply
   395,928x = 629,167.50 × 629,167.50
4. Step 4: Simplify right side
   395,928x = 395,851,743,056.25
5. Step 5: Solve for x
   x = 395,851,743,056.25/395,928
6. Step 6: Final answer
   x = 999,807.40