Finding the Third Proportional to 453,699 and 670,198.50

Step by Step Solution

1. Step 1: Write the proportion equation
   453,699 : 670,198.50 = 670,198.50 : x
2. Step 2: Convert to fraction form
   453,699/670,198.50 = 670,198.50/x
3. Step 3: Cross multiply
   453,699x = 670,198.50 × 670,198.50
4. Step 4: Simplify right side
   453,699x = 449,166,029,402.25
5. Step 5: Solve for x
   x = 449,166,029,402.25/453,699
6. Step 6: Final answer
   x = 990,008.86