Finding the Third Proportional to 287,757 and 672,106.50

Step by Step Solution

1. Step 1: Write the proportion equation
   287,757 : 672,106.50 = 672,106.50 : x
2. Step 2: Convert to fraction form
   287,757/672,106.50 = 672,106.50/x
3. Step 3: Cross multiply
   287,757x = 672,106.50 × 672,106.50
4. Step 4: Simplify right side
   287,757x = 451,727,147,342.25
5. Step 5: Solve for x
   x = 451,727,147,342.25/287,757
6. Step 6: Final answer
   x = 1,569,821.58