Finding the Third Proportional to 287,356 and 624,451.50

Step by Step Solution

1. Step 1: Write the proportion equation
   287,356 : 624,451.50 = 624,451.50 : x
2. Step 2: Convert to fraction form
   287,356/624,451.50 = 624,451.50/x
3. Step 3: Cross multiply
   287,356x = 624,451.50 × 624,451.50
4. Step 4: Simplify right side
   287,356x = 389,939,675,852.25
5. Step 5: Solve for x
   x = 389,939,675,852.25/287,356
6. Step 6: Final answer
   x = 1,356,991.59