Finding the Third Proportional to 399,906 and 877,306.50

Step by Step Solution

1. Step 1: Write the proportion equation
   399,906 : 877,306.50 = 877,306.50 : x
2. Step 2: Convert to fraction form
   399,906/877,306.50 = 877,306.50/x
3. Step 3: Cross multiply
   399,906x = 877,306.50 × 877,306.50
4. Step 4: Simplify right side
   399,906x = 769,666,694,942.25
5. Step 5: Solve for x
   x = 769,666,694,942.25/399,906
6. Step 6: Final answer
   x = 1,924,619.02