Finding the Third Proportional to 287,106 and 629,161.50

Step by Step Solution

1. Step 1: Write the proportion equation
   287,106 : 629,161.50 = 629,161.50 : x
2. Step 2: Convert to fraction form
   287,106/629,161.50 = 629,161.50/x
3. Step 3: Cross multiply
   287,106x = 629,161.50 × 629,161.50
4. Step 4: Simplify right side
   287,106x = 395,844,193,082.25
5. Step 5: Solve for x
   x = 395,844,193,082.25/287,106
6. Step 6: Final answer
   x = 1,378,738.84