Finding the Third Proportional to 491,518 and 664,069.50

Step by Step Solution

1. Step 1: Write the proportion equation
   491,518 : 664,069.50 = 664,069.50 : x
2. Step 2: Convert to fraction form
   491,518/664,069.50 = 664,069.50/x
3. Step 3: Cross multiply
   491,518x = 664,069.50 × 664,069.50
4. Step 4: Simplify right side
   491,518x = 440,988,300,830.25
5. Step 5: Solve for x
   x = 440,988,300,830.25/491,518
6. Step 6: Final answer
   x = 897,196.65