Finding the Third Proportional to 491,609.25 and 664,200

Step by Step Solution

1. Step 1: Write the proportion equation
   491,609.25 : 664,200 = 664,200 : x
2. Step 2: Convert to fraction form
   491,609.25/664,200 = 664,200/x
3. Step 3: Cross multiply
   491,609.25x = 664,200 × 664,200
4. Step 4: Simplify right side
   491,609.25x = 441,161,640,000
5. Step 5: Solve for x
   x = 441,161,640,000/491,609.25
6. Step 6: Final answer
   x = 897,382.71