Finding the Third Proportional to 287,357 and 624,453.50

Step by Step Solution

1. Step 1: Write the proportion equation
   287,357 : 624,453.50 = 624,453.50 : x
2. Step 2: Convert to fraction form
   287,357/624,453.50 = 624,453.50/x
3. Step 3: Cross multiply
   287,357x = 624,453.50 × 624,453.50
4. Step 4: Simplify right side
   287,357x = 389,942,173,662.25
5. Step 5: Solve for x
   x = 389,942,173,662.25/287,357
6. Step 6: Final answer
   x = 1,356,995.56