Finding the Third Proportional to 399,897 and 877,287.38

Step by Step Solution

1. Step 1: Write the proportion equation
   399,897 : 877,287.38 = 877,287.38 : x
2. Step 2: Convert to fraction form
   399,897/877,287.38 = 877,287.38/x
3. Step 3: Cross multiply
   399,897x = 877,287.38 × 877,287.38
4. Step 4: Simplify right side
   399,897x = 769,633,138,334.39
5. Step 5: Solve for x
   x = 769,633,138,334.39/399,897
6. Step 6: Final answer
   x = 1,924,578.42