Finding the Third Proportional to 453,628.50 and 670,099.50

Step by Step Solution

1. Step 1: Write the proportion equation
   453,628.50 : 670,099.50 = 670,099.50 : x
2. Step 2: Convert to fraction form
   453,628.50/670,099.50 = 670,099.50/x
3. Step 3: Cross multiply
   453,628.50x = 670,099.50 × 670,099.50
4. Step 4: Simplify right side
   453,628.50x = 449,033,339,900.25
5. Step 5: Solve for x
   x = 449,033,339,900.25/453,628.50
6. Step 6: Final answer
   x = 989,870.21