Finding the Third Proportional to 399,898 and 877,289.50

Step by Step Solution

1. Step 1: Write the proportion equation
   399,898 : 877,289.50 = 877,289.50 : x
2. Step 2: Convert to fraction form
   399,898/877,289.50 = 877,289.50/x
3. Step 3: Cross multiply
   399,898x = 877,289.50 × 877,289.50
4. Step 4: Simplify right side
   399,898x = 769,636,866,810.25
5. Step 5: Solve for x
   x = 769,636,866,810.25/399,898
6. Step 6: Final answer
   x = 1,924,582.94