Finding the Third Proportional to 404,310 and 857,908

Step by Step Solution

1. Step 1: Write the proportion equation
   404,310 : 857,908 = 857,908 : x
2. Step 2: Convert to fraction form
   404,310/857,908 = 857,908/x
3. Step 3: Cross multiply
   404,310x = 857,908 × 857,908
4. Step 4: Simplify right side
   404,310x = 736,006,136,464
5. Step 5: Solve for x
   x = 736,006,136,464/404,310
6. Step 6: Final answer
   x = 1,820,400.53