Finding the Third Proportional to 499,698 and 656,059.50

Step by Step Solution

1. Step 1: Write the proportion equation
   499,698 : 656,059.50 = 656,059.50 : x
2. Step 2: Convert to fraction form
   499,698/656,059.50 = 656,059.50/x
3. Step 3: Cross multiply
   499,698x = 656,059.50 × 656,059.50
4. Step 4: Simplify right side
   499,698x = 430,414,067,540.25
5. Step 5: Solve for x
   x = 430,414,067,540.25/499,698
6. Step 6: Final answer
   x = 861,348.39