Finding the Third Proportional to 372,717 and 818,653.50

Step by Step Solution

1. Step 1: Write the proportion equation
   372,717 : 818,653.50 = 818,653.50 : x
2. Step 2: Convert to fraction form
   372,717/818,653.50 = 818,653.50/x
3. Step 3: Cross multiply
   372,717x = 818,653.50 × 818,653.50
4. Step 4: Simplify right side
   372,717x = 670,193,553,062.25
5. Step 5: Solve for x
   x = 670,193,553,062.25/372,717
6. Step 6: Final answer
   x = 1,798,129.82